HCIE-Collaboration (Written) V2.0 H11-879_V2.0 Exam Actual Questions

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HCIE-Collaboration (Written) V2.0 H11-879_V2.0 exam information can help you understand the test well. There are 60 single-answer questions, multiple-answer questions, true or false, short Response items, and drag-and-drop items, and you have 90 minutes to answer all the questions. The required passing score for the H11-879_V2.0 exam is 600. The exam cost is $300. The available languages are Chinese and English. Our HCIE-Collaboration (Written) V2.0 H11-879_V2.0 exam actual questions are your preparation. Free Huawei Certification H11-879_V2.0 exam actual questions are below.

Page 1 of 37

1. Two interconnected Huawei VP terminals A and B communicate through a conference scheduled by Huawei 8650+SMC. A uses the T.140 protocol to send a banner to B. The color of the banner displayed on B is?

The banner color configured on the terminal before terminal A sends

Color of subtitle banner defined on MCU

The color of the subtitle banner defined on the SMC management platform

Banner color configured on terminal B

2. The FEC forward error correction algorithm is an algorithm that sends redundant data at the transmitting end, and the decoding end recovers the code stream based on the redundant data.

True

False

3. Which of the following does not belong to the video conferencing system protocol system?

320

323

SIP

3GPP

4. Which of the following is not the most basic component of the H.323 protocol framework?

MCU

SMC

Terminal

5. Regarding the relationship between auxiliary streams and audio and video, which of the following descriptions is wrong?

Generally speaking, the codec protocol used by the auxiliary stream is the same as that of ordinary video.

Generally speaking, the effect of auxiliary flow is worse than that of mainstream flow

Auxiliary streams can also be transmitted on the mainstream channel

In a multi-point video conference, the main stream can form a multi-viewer with the auxiliary stream.

6. The basic functions of GateKeeper defined in the ITU-TH.323 protocol do not include?

Geocoding

Network segment restrictions

Bandwidth Management

Regional management

7. 08:08:01 ARJ sendto [(61.131.13.141:1719)] [Caller] [59512724] [(61.131.13.141:1720)] [Callee][59522000051] [[Ox0000006derr_call callee_offline]

From the above GK log, we can see that the possible reasons for the call failure are?

The called person is offline

The called person is busy

Insufficient call bandwidth

Capability negotiation failed

8. In the H.323 protocol system, H.225 RAS is carried on the () layer

UDPfv

TCP

Data link layer

9. Among the following RAS messages, which one enables the gatekeeper to reject the node's access authentication and address resolution request?

GRQ

RRQ

URQ

LRQ

10. The gateway in H.323 is between a circuit-switched network and a packet-switched network.

True

False

Page 2 of 37

11. Which of the following is not a security mechanism of SIP?

IPsec

SIPS

RTP

Digest authentication

12. Cancel transaction can be used to cancel which of the following transaction?

BYE transaction

Invite transaction

Update transaction

Info transaction

13. Configure Huawei GK-1 and Huawei GK-2 as neighbor GKs. Terminal A and Terminal B are registered in GK-1, and Terminal C is registered in GK-2. If both GK-1 and GK-2 enable Q931 routing, and terminal A actively calls the number of terminal C and the call is successful, how many SETUP messages are used in the call process?

1 time

2 times

3 times

4 times

14. The terminal reads camera data through which of the following?

Video cable

Audio cable

Control line

Infrared

15. Regarding HD terminal auxiliary IP, which of the following statements is wrong?

You don’t need to fill it in

Used for terminal debugging in LAN

For main business

You can enter the terminal through this IP

16. TE60 supports multi-viewing effects up to?

Double visions

Three visions

Four visions

Five visions

17. Which of the following terminals does not support 8M call bandwidth?

TE30

TE40

TE50

TE60

18. The maximum pickup distance of VPM220 array microphone is?

19. Local terminals or remote terminals cannot call each other through IP addresses. Which of the following statements is incorrect?

The local end is in a private network, the remote end is in a public network or another private network, and the NAT parameters are not set correctly.

Failure to register GK locally or remotely

Local or remote network disconnection

GK registered locally or remotely is not allowed to call through IP address

20. VP96XX MCU supports which port allocation strategy?

Fixed

Dynamic automatic configuration

Manual configuration

None of the others

Page 3 of 37

21. Which of the following interfaces on the MCU is the default business network port?

GEO

GE1

RS232

22. GK’s active/standby switching is coordinated by heartbeat connections.

True

False

23. When using the MCU fence mode, the firewall in the original network needs to be modified (such as opening ports).

True

False

24. When using the MCU fence mode, the terminal on the GEO side can call the terminal on the GE1 side through IP.

True

False

25. How many E1 lines can 86 series MCU service board connect to at most?

128

26. SMC2.0 is based on the enterprise organizational structure management model. How many system users are there by default?

one kind

Two kinds

Three kinds

Four kinds

27. The implementation principle of the SMC2.0 configuration lock function is that the SMC regularly delivers the configuration to the terminal device, and the terminal parameters modified by the user will be restored by the SMC.

True

False

28. In the SMC2.0 system, which of the following users has the highest authority level?

Conference Manager

Conference Operator

System administrator

System debugger

29. All MCUs in the same service area must have the same prefix number.

True

False

30. In the recorded meeting, the network recording service records the meeting content and also supports real-time viewing of the meeting through the live broadcast client.

True

False

Page 4 of 37

31. A terminal failed to register with GK and found that the rejection code of GK was gkRejGkNoEnoughRegTable. Which may be caused?

When SwitchCentre defines the terminal to use password authentication, the password provided when the terminal initiates a registration request to SwitchCentre is incorrect.

Network segment bandwidth restrictions are configured on SwitchCentre.

Non-standard terminals register with SwitchCentre. The registration signaling is illegal and fields are missing.

When the number of nodes registered on SwitchCentre has reached the value specified by the license

32. Network recording supports downloading recorded video files to the local in which format and supports local playback?

FLV

WMV

RMVB

MTV

33. The IP of a private network terminal is 10.1.0.10, the static NAT export address is 61.1.0.10, the GK address is 61.1.0.11, and there is another public network terminal: 61.1.0.12. At this time, the public network terminal calls the private network in point-to-point IP mode, which is calling address?

10.1.0.10

61.1.0.10

61.1.0.11

61.1.0.12

34. Under static NAT networking, the packets sent by private network terminals through the firewall will be changed. Which of the following descriptions is wrong?

The terminal RAS addr changes to the address after NAT

The terminal CS addr changes to the address after NAT

NAT addr is the public network exit address of the firewall

GK RAS addr becomes the address after NAT

35. During a call using the H.323 protocol, the RRQ message Payload of the calling site contains Caller RAS Addr, Caller number, and Caller CsAddr.

True

False

36. After enabling NAT settings on the video conferencing terminal, the content of the packets can be changed. It can be used in static NAT networking mode or DNAT/NAPT networking.

True

False

37. In the default configuration of the firewall, communication from a high-security network (intranet) to a low-security network (Internet) is generally not restricted, but the firewall will block it on the other hand.

True

False

38. See networking. Assume that all terminals have been registered to GK/SC, there are no port restrictions on NAT1 and NAT2, and all terminals are TE30 terminals (H.323). Then T1 calls T3. Which of the following description is correct?

GK routing is required

Unable to communicate with each other

Can communicate directly with each other

Requires MCU routing

39. Which is the core reason why video conferencing supports public and private network traversal?

There is a firewall or NAT, so public and private network traversal must be supported.

Signaling and media transmission channels are not unified

There is a media transmission address in the signaling, and the NAT device only performs address translation on the IP header, so public and private network traversal processing is required.

Because the network performs address translation on IP packets

40. The network on the TP3106 wall is connected to which port of the switch by default?

Page 5 of 37

41. In the IP settings of the telepresence codec of the TP3106 system, the local IP should fill in the intranet address.

True

False

42. When installing the small table plate of the flip screen on TP3106, it needs to be adjusted directly by hand and cannot be powered on.

True

False

43. TP3106 three-screen telepresence calling sequence is?

Left->Center->Right

Center->Left->Right

Center->right->left

At the same time

44. Which of the following is a safe access method for remote maintenance of telepresence hosts?

http

teInet

SNMP

https

45. A multi-point conference is held on the VP9650 MCU, and the auxiliary stream adopts the "Live" mode. The MCU can distribute the video stream to all venues according to its own conference strategy.

True

False

46. The interconnection between two U1900 series unified gateways can only be achieved through SIP trunking.

True

False

47. The customer purchased two SCs, SC1 and SC2 respectively. Even if SCI is configured with one service IP and SC2 is configured with two service IPs, it will not affect the master-standby relationship between SC1 and SC2.

True

False

48. The AR router provides SIP signaling tracing function, which needs to be viewed in the diagnostic view.

True

False

49. In the SMC2.0 service area configuration, only one server prefix can be configured for each service area.

True

False

50. In video systems, image processing uses RGB color space.

True

False

Page 6 of 37

51. In the SIP session service, in which of the following ways does the called terminal realize the interaction of media capabilities?

In the 100trying message, the called SDP media capability is carried.

In the 180 or 183 session progress, the called SDP media capability is carried

The 200OK message carries the called SDP media capabilities.

Acknowledge in ACK message

52. In a remote disaster recovery scenario, when the main node (U1981) fails, POTS user A of a branch node (the branch site device is U1911) makes an outbound call to local PSTN user B through the branch node, and the SIP signaling of the call passes through network element is?

U1911-> Standby U1981->U1911

Standby U1981->U1911

U1911

U1911->Main U1981->Standby U1981->U1911

53. In H.460 public-private network traversal networking, TS (traversal server) does not need to have which of the following functions?

NAT

GK server

GW server

H460.19 server

54. Which Huawei patented technology has been introduced in the TP3206 system based on the old version TP3106?

Common optical center camera technology

Remote handshake

Electronic name tag

Remote dinner party

55. In a built-in MCU terminal plus RSE network, which of the following functions can be independently implemented on the terminal without the help of SMC?

Point-to-point recording conference

Three-party live conference

Point-to-point live conference

Recording and broadcasting resource management

56. In the same service area, there are VP9650 MCU and VP8650 MCU (both have sufficient available resources). If the "Main MCU" parameter is configured as "Auto" on SMC2.0, which MCU will SMC use first?

VP9650 MCU

VP8650 MCU

Random selection

Choose the one with more resources among the two.

57. Which of the following descriptions of SIP registration is incorrect?

Users need to register with the server every time they turn on their computer.

When the SIP Client's address changes, it needs to be re-registered.

Registration information must be refreshed regularly. Register usually saves the registration information to the Lation Server.

The function of SIP registration is to bind the AOR address to a Contact address so that the Proxy can find the calling address when making a call.

58. By connecting the RS-232 control interface of the HD camera and the COM port of the HD terminal through a COM port cable, the HD terminal can remotely control the pan, tilt, zoom, preset position, etc. of the camera. The length of the COM port cable is fixed and cannot be extended.

True

False

59. Direct sound refers to the sound signal that reaches the listener directly from the sound source. The meeting requirements are mainly direct sound.

True

False

60. In the H460 public-private network traversal single SC network, the H.245 TCP connection of the private network terminal is established with the TS (traversal server).

True

False

Page 7 of 37

61. Packet loss retransmission ARO is similar to the TCP retransmission mechanism. When the UDP packet loss of the video code stream is detected in the network, the peer is required to resend the UDP code stream. Decoding begins when the receiving end receives the retransmitted code stream.

True

False

62. The U1911 system requires an MTU board to complete analog trunk outbound calls.

True

False

63. The built-in voice mailbox of U1960 does not include which of the following functions?

Recording of voice messages

Storage of voice messages

Extraction of voice messages.

Forwarding of voice messages

64. In the scenario where a private network terminal calls a public network terminal, when the logical channel is opened, the media stream will be unidirectional. The reason may be which of the following?

The firewall does not open the corresponding port.

The public network terminal cannot find the private network address.

The terminal cannot perform master-slave determination.

The terminal cannot perform capability negotiation.

65. During the meeting, if the remote end reports that our image is blurred and the image is normal through the local video loopback test, which of the following reasons is responsible for this phenomenon?

There is a problem with remote decoding.

There is a problem with the remote encoding.

There is a problem with local decoding.

There is a problem with local encoding

66. Color temperature affects the color reproduction of video images. If the color temperature is higher, what color will the image tend to be?

bluish

reddish

Yellowish

Whiter

67. A company has deployed a U1981 and is connected to the PSTN through a PRA trunk. If you want external users to be unable to call external users after incoming calls through this trunk, it is recommended to configure which of the following trunk outgoing call permissions is recommended?

Intra-office call

Local call

Domestic long distance calls

International long distance calls

68. Which of the following devices can provide a unified address book service for the video conferencing system?

EUA

MCU

Terminal

69. In the U1900 series unified gateway, which of the following descriptions about prefixes is correct?

The prefixes are divided into intra-office prefixes and outgoing prefixes.

The intra-office prefix refers to the prefix used when dialing between different extensions of the same company.

Since prefix 28 includes prefix 289, the system analyzes the called number according to the maximum matching principle. For calls with the called number 28901111, prefix 28 should be selected.

The prefix must correspond to the office route selection code.

70. Which layer is the SIP protocol?

Application layer

Transport layer

Network layer

Data link layer

Page 8 of 37

71. Which of the following descriptions about SMC2.0 service area backup is correct?

SMC2.0 supports globally defining the backup sequence of service areas.

Each service area has its own backup service area and priority.

Define backup relationships between service areas.

Multiple service areas cannot share a backup service area.

72. The existing venues T1 and T2T3 have venue numbers 0571001, 0571002, and 0571003 respectively. There are three MCU1, MCU2, and MCU3 with prefixes 0571, 0551, and 0755 in the same service area. Nowadays, these three venues are used on SMC to convene tripartite meetings. Which of the following statements is correct?

If all three MCUs have sufficient resources, the conference will be automatically scheduled on MCU1.

If all three MCUs have sufficient resources, the conference will be automatically scheduled on |MCU2.

If all three MCUs have sufficient resources, the conference will be automatically scheduled on MCU3.

When DSMC schedules a conference, it will first select the MCU with the most remaining resources in the same service area.

73. Which of the following descriptions of Adhoc meetings is incorrect?

Before using an Adhoc conference, you need to create a new Adhoc conference template.

When reserving an Adhoc conference, set the chairman password and conference activation password respectively.

Adhoc conference does not occupy MCU resources when it is not activated.

Adhoc conference is a conference method that activates the conference and joins the conference through the terminal side.

74. The company is now going to hold a provincial seminar, which requires City A Conference Center and City B Conference Center to join in and hold it together. Conference centers in city A often use conference template A to hold meetings, and conference centers in city B often use conference template B to hold meetings. From the perspective of feasibility and ease of operation, which of the following methods can be used to initiate a meeting?

Calling call set

Adhoc

IVR dial-up to join the conference

Multi-level meetings

75. Which of the following descriptions about the internal bus and hardware modules of the U1900 system is incorrect?

The main function of the main control module of the U1911 system is broadband protocol analysis, calling and resource control.

The U1981 system bus includes SM-BUS, PM-BUS, RS232, IP-BUS and TDM-BU

The main functions of the U1900 system MTU module include sound playback, provision of voice venue resources, TDM to IP packet conversion, fax protocol conversion, digit collection and A/D conversion, etc.

The U1960 system hardware module includes the main control module SCU, the media resource module MTU, the relay module MTU/OSU and the analog user module ASI/OS

76. The code rate calculation method of the PCM audio stream of the audio signal is the sampling rate value x sampling size value x number of channels.

True

False

77. The screen size of a tablet computer is 9 inches, and the maximum screen resolution is 1080p. What is the approximate pixel density ppi of the screen?

200

220

240

260

78. When SMC2.0 schedules a conference, it prompts "Insufficient IP port resources", but the MCU is online and the number of IP ports is sufficient.

Which of the following options may cause this error?

There is no corresponding MCU in the service area.

The license resources of SMC2.0 are insufficient.

The venue protocol and rate are inconsistent.

MCU is not registered to G

79. If a Huawei TE series terminal is used for point-to-point calls and the video-related configurations are set to "Auto", which of the following descriptions is correct?

If the bandwidth is sufficient, 1080P60 format is preferred for the main video.

If the bandwidth is sufficient, 1080P30 format is preferred for the main video.

If the bandwidth is sufficient, 720P60 format is preferred for the main video.

If the bandwidth is sufficient, 720P30 format is preferred for the main video.

80. In a multi-channel cascade, how are the multi-channel usage priorities of the upper and lower MCUs allocated?

The two priorities are the same

The priority of the upper-level MCU is greater than that of the lower-level MC

The priority of the upper-level MCU is lower than that of the lower-level MC

You can configure the priority as needed

Page 9 of 37

81. Which of the following devices does not support built-in GK function?

VP9630

VP9660

VP9650

VP8650

82. When responding to a synchronization request, the standby GK completes which of the following processes?

Check whether the system data status is valid for primary use

Start the synchronization task process (lowest priority)

Check whether the synchronization is completed every 1 second.

Task paused for 1ms

83. The general rules for SMC to divide service areas include that a service area must have at least one MCU.

True

False

84. The MCU decodes the images of each terminal that need to be added to the multi-picture combination, then combines and encodes them into one image, and transmits them to all terminals viewing the multi-picture

True

False

85. Which of the following descriptions about the eSpace IP phone upgrade method are correct?

eSpace IP phones support unified upgrade on the U1900 series unified gateway web management interface.

eSpace IP phones support automatic upgrade.

eSpace IP phones support single upgrade on the eSight interface.

eSpace IP phones support manual upgrade.

86. A point-to-point call is established and the call rate is specified as 2Mbps. When the network bandwidth is reduced to 1Mbps, the terminal can automatically adjust the bandwidth to 1Mbps for the conference.

True

False

87. "SMC2.0 + VP9650 MCU + TE40 terminal network, SMC2.0 convenes a conference, but the TE40O terminal does not join the conference, and prompts that the called number is an empty number. According to the following SC log information, it can be determined that the reason for this situation is which of the following One item?

2015-09-2215:04:12.599+08:00, USER_TYPE_LOGINFO, H323, [TID<115961>]ARQ recvfrom <172.2.1.23:1729>EPID<131075> callee<031128> isCalleeARQ<O>

2015-09-2215;04:12.599+08:00,USER_TYPE_LOGINFO,H323,[TID<115961>]LRQ sendto <139.12.47.108:1719>callee<031128>

2015-09-2215:04:12.662+08:00, USER_TYPE_LOGINFO, H323, [TID<115961>]LRJ recvfrom <139.12.47.108:1719>RASReason<Ox00000014> SCReason<Ox0000006e>

2015-09-2215:04:12.662+08:00, USER_TYPE_LOG, WARN, CALLBUSINESS, Tid: 227467 Finish Searching the TargetZone: Name: Xishan failed! Reason: ERR_BUSINESS_CALL_CALLEE_NOT_EXIST[Ox21200105]TBackupSSID: 115960, TA taChange:4"

The TE40 terminal is not registered with GK, and GK prompts that the called number does not exist.

The MCU did not register the GK normally, and the GK prompted that the called number did not exist.

The GK of SMC2.0 is configured with a neighbor GK, but the local GK prompts that the called number does not exist.

The GK of SMC2.0 is configured with a neighbor GK, but the neighbor GK does not place the terminal number.

88. A codec rate is 64kbps and the packaging time is 20ms. The IP bandwidth occupied by this codec is () kbps. (Note: IP/UDP/RTP header is 40 Bytes, here 1kbps=1000bps).

83.6

76.6

90.4

89. Regarding the advantages of MCU cascade networking, which one of the following descriptions is wrong?

The port capacity of a single MCU is insufficient. MCU cascading can increase the capacity.

The central MCU line bandwidth is insufficient, and MCU cascading can reduce the bandwidth requirements.

MCU cascading can realize device partition management.

MCU cascading can enhance conference security.

90. Users can initiate a multipoint conference through the terminal. Which of the following methods does this conference convening method belong to?

Calling call set

SMC convenes a meeting

SMS call

Unified access number call

Page 10 of 37

91. Color temperature affects the white balance of photography, and complex color temperatures will cause color cast in the image.

True

False

92. Which of the following descriptions about office routes and office route selection in the U1900 series unified gateway is correct?

The gateway needs to add the office route first and then add the office route selection code.

The office route is associated with a specific intelligent routing policy.

System - When the gateway is configured with an outgoing prefix, it will be associated with the office route selection code.

The office route and the office route selection code correspond to each other.

93. SMC2.0 can back up MCU resources. When the main MCU is detected to be offline, the backup MCU will be enabled.

True

False

94. RSE6500 supports simultaneous recording and playback of 3-screen telepresence. Which description of the implementation principle is correct?

The 3-screen telepresence synthesizes a picture by itself and then sends it to the RSE6500 for recording.

The 3-screen telepresence directly sends 3 streams to RSE for recording.

Use the MCU to combine the 3-screen telepresence images into one image, and then send it to the RSE6500 for recording.

Use the analog video synthesizer to synthesize the 3-screen telepresence into one picture, and then send it to the RSE6500 for recording.

95. The basic principles for improving architectural acoustics are: maintain an appropriate volume, reduce background noise as much as possible, use direct sound as much as possible for pickup, and make appropriate use of reverberation sound for sound pickup.

True

False

96. The branch parameters of the CANCEL transaction are the same as those of INVITE.

True

False

97. When scheduling a conference in SMC, if "Main MCU" selects "Auto", SMC will prioritize the conference to the MCU in the service area where the conference site belongs.

True

False

98. To hold a 720P30 multi-party video conference with a low frame rate auxiliary stream, the recommended conference bandwidth is 768Kpbs, and the recommended network bandwidth is 1.5 times the conference bandwidth.

True

False

99. The POTS user number in the U1900 system is bound to the analog port and has nothing to do with the analog phone connected to the analog port.

True

False

100. INVITE transaction consists of a three-way handshake. The client transaction sends INVITE, the server transaction sends a response, and the client transaction also sends an ACK.

True

False

Page 11 of 37

101. Which of the following devices cannot see the auxiliary stream when joining a multipoint conference held by VP9630?

TE30

SX20

MC850

Everyone can see the auxiliary flow

102. Regarding Huawei MINIMCU function, which of the following description is correct?

The MINIMCU capability description of a terminal is 4V+3A, which means that the terminal can access 4 other video venues and 3 audio venues.

A MINIMCU has access to two TE40 video sites. One of the TE40 sites calls the other mobile site through the PSTN port to access the conference. At this time, the MINIMCU's audio site access capability will be reduced by 1

The MINIMCU capability of a certain model of terminal is described as 6V+3A, then this MINIMCU can hold two 3-point video conferences at the same time.

Other errors

103. Regarding the comparison between MCU 4-way mixing and 2-way mixing, which of the following statements are correct?

4-way mixing is less likely to cause sound interruption due to voice grabbing.

The overall noise of the 4-party mixing noise is smaller

The 4-way mixing volume is louder

The experience of 4-party mixing and 2-party mixing is the same.

104. In a system with active and standby GK deployed, when the active GK is working, the GK address registered by the terminal is the active GK address.

True

False

105. In the H.323 framework protocol, what is the role of the RTP protocol?

Conference Control

Real-time transmission

Call signaling

Media Control

106. In the video conferencing system, which system module implements regional management?

MCU

HD terminal

107. In the H.323 protocol, which message used to complete the capability exchange process?

GRQ,GCF

DRQ,DCF

TCSR,TCSA

MSDR,MSDA

108. In the H.323 protocol, which message used to complete the process of opening a logical channel?

CLC, CLCA

OLC, OLCA

TCSR,TCSA

MSDR,MSDA

109. After GK receives the call request and resolves the called node according to the called number to a node in the neighbor GK area, GK will request the neighbor GK to resolve the called number.

True

False

110. The transmission method of high-definition terminal secondary dialing does not include?

245

RFC2833

DTMF

225

Page 12 of 37

111. Which of the following is not a basic message of sip?

Option

Info

Invite

112. In the camera control of the HD terminal WEB interface, only the local camera can be controlled, but the remote camera cannot be controlled.

True

False

113. T.140 subtitles support SIP and H.323 type terminals to send and receive subtitles.

True

False

114. Which of the following terminals do not support standard definition video input?

9030

9035A

9039s

9039A

115. The echo cancellation technology supported by the VPM210 array microphone is?

AEC

AGC

ANS

None of the others

116. The maximum optical zoom factor supported by VPC600 series cameras is?

12X

10X

18X

117. Telepresence venue cascade conference: three screens can be switched simultaneously during broadcast and switched during voice control

Left screen

Home screen

Right screen

Three screens

118. 9000 series terminals will report the packet loss rate to the MCU every () by default.

20S

15S

119. VP9650 MCU has a total height of ()U and a total of () slots

5U/3

4U/3

5U/4

4U/4

120. When the MCU works in the fence mode, it needs to use a private protocol and can network with terminals from different manufacturers.

True

False

Page 13 of 37

121. A conference can support up to () groups of multi-presence.

1 group

12 groups

24 groups

Group 96

122. The packet loss rate recorded by NLOG does not include the packet loss of data communication equipment on the line.

True

False

123. When SMC 2.0 manages terminal equipment, which parameter cannot be modified?

Terminal registration number

GK registered address

Terminal name

Terminal IP address

124. When using two GKs to work together for H.460 traversal networking, you need to add () to the GK on the public network.

460 server routing

Private network GK routing

Both

460 server routing and private network GK routing must be added.

Neither the

460 server route nor the private network GK route is added.

125. In the H.460 media stream interoperability solution, which of the following protocols is used to establish keepalive packets?

931

460.18

460.19

225.0

126. In the H.460 public-private network traversal network, the code stream hole from the public network to the private network is opened by the RTP redirect message. How is it maintained in the future?

IRQ heartbeat message

Non-standard IRQ message

Subsequent RTP/RTCP code stream

No maintenance required

127. In H.460 networking, at which signaling transmission stage are the keep-alive duration, keep-alive port, and keep-alive fields transmitted?

In ARQ message

In ACF message

OLC opens logical access process

In IIR message

128. See networking. Assume that all terminals have been registered to GK/SC, there are no port restrictions on NAT1 and NAT2, and all terminals are TE30 terminals (H.323). Then T3 calls T5. Which of the following descriptions is correct?

GK routing is required

Unable to communicate with each other

Can communicate directly with each other

Requires MCU routing

129. The camera of the TP3106 three-screen telepresence system has a total of () lenses.

130. The DVI output of the TP3106 three-eye camera is connected to three telepresence codecs on the left, middle and right respectively.

True

False

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131. The video signal interfaces of the three flip screens of TP3106 are directly connected to the interfaces on the telepresence host.

True

False

132. The network port of the TP3106 desktop socket is connected to the external network (that is, connected to the business network).

True

False

133. Which of the following products is the terminal of RP100-46S?

TE30

VP9039

VP9035

TE40

134. RRJ sendto [(218.5.64.98: 18616)] [59285094444]

[[Ox00000065: err_reg_wrong_account_or_password]]

From the above log, we can see that the possible reasons for registration failure are?

The account password is wrong

Network segment registration restrictions

Network segment bandwidth restrictions

Communication line abnormality

135. In Huawei’s eSpace UC solution, U1981, U1980, U1960, and U1911 all support dual-machine master and backup.

True

False

136. When performing venue backup on SMC2.0, no configuration is required on the terminal side. You only need to make corresponding configurations on SMC2.0.

True

False

137. All other factors being equal, the longer the reverberation time of the room, the clearer the sound you hear.

True

False

138. SMC 2.0+VP9650 MCU+TE50 terminal network, manually configure the protocol and format of the conference template to H.264720P30F, but after convening the meeting, it is found that the conference entry protocol and format of all venues are H.264 4CIF. Which of the following inference is reasonable?

The capability of the main venue is set incorrectly. Check whether the capability of the main venue reaches

26472O

Caused by incorrect VP9650 MCU port configuration. Check the VP9650 MCU port configuration.

SMC 2.0 does not import the license, so re-import the valid license.

The account permissions for scheduling the meeting are insufficient. Use the admin account to log in and reschedule.

139. In the packet classification of RTCP protocol, which of the following packets describes the receiving statistics of the receiving gateway?

BYE

SDES

140. The GK rejection code "gkReqGkNoEnoughRegTable" may be caused by which of the following reasons?

When SwitchCentre defines the terminal as using password authentication, the password provided when the terminal initiates a registration request to SwitchCentre is incorrect.

Network segment bandwidth restrictions are configured on SwitchCentre.

A non-standard terminal initiates registration with SwitchCentre. The registration signaling is illegal and lacks fields.

The number of nodes registered on SwitchCentre has reached the value specified by the license.

Page 15 of 37

141. RTCP is a real-time transport protocol: data transmission can be monitored and controlled in a way that cannot be upgraded to large multicast (multicast) networks.

True

False

142. Which of the following is the correct ranking of the voice quality of different voice codec protocols?

G711 > G728 > G722 > AAC LD

G722 > G711 > G728 > AAC LD

AAC LD >G722 >G711 > G728

AAC LD > 6722 G728 > 6711

143. An enterprise purchased three U1960s and has about 2,500 IP phone users. Which of the following networking methods is suitable for these three U1960s?

Multi-node centralized call management network

Peer-to-peer distributed call management networking

Distributed call management networking in convergence mode

144. VP9660 MCU does not support which of the following backup methods?

Main control board backup

Power backup

IP/E1 line backup

Media/Signaling Board Backup

145. Check the MCU log and see the following record:

[User] [Notice] 2015-11-2501:59:55 main 2589173 Null [EXPARA: 11 <CPUID=Ox0>] string: [diagnose][reboot]Reboot MCU at midnight!

This log indicates why the MCU restarted?

Automatic restart at midnight

CPU usage is too high

CPU temperature is too high

Customer manually restarts

146. A transaction can only be identified by a unique branch.

True

False

147. Phone A has been successfully registered to the U1900 system. After a certain period of time, unplug the Internet cable of phone A. At this time, you can log in to the 1900 system to see what the registration status of phone A is?

The registration status of phone A in the U1900 system may change immediately.

The registration status of phone A in the BU1900 system may remain unchanged.

The registration status of phone A in the U1900 system may change after a period of time.

The registration status of phone A in the U1900 system is updated; it only changes after half of the registration period of phone A after the network cable of phone A is unplugged.

148. If IP phone A fails when registering to the U1900 system, when analyzing the cause of the failure, which of the following situations will not cause the registration to fail?

The network of IP phone A is unavailable.

The SIP server information in the configuration of IP phone A is incorrectly configured.

The SIP account and password configured on IP phone A are incorrect.

The user ID and phone number of IP phone A configured in the U1900 system are inconsistent.

149. When performing a one-click conference entry operation, what is the basis for finding the conference list displayed on the terminal?

All scheduled meetings on SM

All meeting templates on SM

All active meetings on SM

All scheduled conferences on the SMC that include the terminal site.

150. Which of the following network ports is the default business network port of the MCU?

GEO

GE1

RS232.

Page 16 of 37

151. The screen size is 7 inches, the maximum screen resolution is 1080p, and the screen’s ppi is approximately ().

260

310

400

500

152. In the SMC2.0 system, the terminal number or name needs to be protected from accidental modification. Which of the following methods is the most appropriate?

Configuration template

Configuration Lock

Using unmanageable devices

Change terminal password regularly

153. Which of the following descriptions about SMC2.0 service area backup is incorrect?

When the resources in the main service area are insufficient, SMC2.0 will schedule all non-dedicated line sites to the backup service area instead of only adjusting the redundant sites.

When scheduling fails due to insufficient resources in the backup service area, the neighboring cell will no longer use its backup service area for scheduling.

All venues in an area will only be scheduled to one backup service area and will not be dispersed to multiple backup service areas.

All venues in an area can be distributed to multiple backup service areas to achieve load sharing.

154. In video conferencing, which anti-packet loss method will not increase network bandwidth?

ARQ packet loss retransmission

FEC forward error correction

Packet loss compensation PLC

Redundant coding

155. How many independent channels of video images can the dynamic dual stream support simultaneously transmitting to the remote end?

156. Which of the following signalings does the gatekeeper use to reject requests for access authentication and address resolution, and give the resolution results?

RRJ

GRJ

URJ

ARJ

157. The function of the LAN2 port of the high-definition terminal is?

For main business

Local login terminal configuration, packet capture

Used for primary and secondary switching with LAN1 port

Used for load sharing of LAN1 port

158. The () protocol is used to transmit the code stream between the MCU and the network recording and broadcasting server.

323

SIP

RTP

159. When encoding image data using the H.264 video protocol, which of the following color spaces will be used?

RGB

HIS

YUV

CMY

160. Blocking effects may occur when using the H.264 video protocol codec. What is the main reason?

The macroblock is in an area of intense motion and has a large difference, resulting in obvious edges.

The quantization level of the coding block jumps, resulting in sudden brightness changes at the boundary.

Unreasonable division of macroblock coding modes, resulting in false edges

Deblocking filtering (Deblocking) is not strong enough, resulting in insufficient smooth edges.

Page 17 of 37

161. In video conferencing, which of the following types of microphones is recommended to reduce echo?

Omnidirectional

Unidirectional type

Bidirectional type

Regardless of microphone type

162. When configuring Huawei GK, only one GK prefix can be added to a GK.

True

False

163. In the H.323 protocol system, Q.931 is carried on the () layer

UDP

TCP

Data link layer

164. In the H.323 framework protocol, the protocol used by dual streams is?

261

245

225

239

165. In the H.323 protocol, the message used to complete the master-slave determination process is?

GRQ,GCF

DRQ,DCF

TCSR,TCSA

MSDR,MSDA

166. In the H323 protocol, the message used to complete the process of closing the logical channel is?

CLC, CLCA

OLC, OLCA

TCSR,TCSA

MSDR,MSDA

167. The natural frequency response capability that the human ear can perceive can reach 20Hz - 20KHz. When using G.711, G.722, G.728 and other audio encodings, the audio width is only 50Hz - 7KHz. Therefore, in high-definition video communication Use AAC-LD audio encoding to improve sound quality.

True

False

168. Which of the following functions does not belong to the services provided by GK in H.323 networking?

Geocoding

Access authentication

Bandwidth Management

Device management

169. If GK supports H.225 signaling routing but does not support H.245 signaling routing, which of the following signaling does not pass through GK?

ARQ

Setup

EndSession

Alerting

170. Which of the following SIP messages is used to query the capabilities of servers and clients in the network?

Invite

Option

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171. What type of message does the SIP response message 300~399 belong to?

Success

Redirect

Client error

Server error

172. Which of the following SIP status codes indicates that the called party is temporarily unavailable and the call is in queue waiting for processing?

100

180

181

182

173. There is a 9039S-M (IP: 211.75.128.160), which first calls terminal A (IP: 122.147.130.244), and then calls terminal B (IP: 211.75.128.159), trying to form a multipoint call, as shown in the figure Screenshots of packet capture and filtering on the 9039S-M side during the process. When 9039S-M calls terminal A, judging from the screenshot, which of the following statement is correct?

9039S-M and terminal A can establish a call, but the media communication is abnormal and the audio is single-passed;

9039S-M and terminal A can establish a call, but the media communication is abnormal and the video is single-passed.

9039S-M and A terminal can establish a call, but the media communication is abnormal, and the video and audio are both single-pass.

9039S-M and A terminal can establish a call, and media communication is normal

174. Configure Huawei GK-1 and Huawei GK-2 as neighbor GKs. Terminal A and Terminal B are registered in GK-1, and Terminal C is registered in GK-2. If neither GK-1 nor GK-2 enables Q931 routing, and terminal A actively calls the number of terminal C and the call is successful, how many SETUP messages will be used during this call?

1 time

2 times

3 times

4 times

175. Configure Huawei GK-1 and Huawei GK-2 as neighbor GKs. Terminal A and Terminal B are registered in GK-1, and Terminal C is registered in GK-2. If neither GK-1 nor GK-2 enables Q931 routing, and terminal A actively calls the number of terminal C and the call is successful, which of the following statement about the CONNECT message in this process is correct?

Terminal A will send a CONNECT message

Terminal C will send a CONNECT message

GK-1 will send a CONNECT message

GK-2 will send a CONNECT message

176. Configure Huawei GK-1 and Huawei GK-2 as neighbor GKs. Terminal A and Terminal B are registered in GK-1, and Terminal C is registered in GK-2. If both GK-1 and GK-2 enable Q931 routing, when terminal A actively calls the number of terminal C, which of the following statement is correct?

If GK returns an ACF message to terminal A, the call signaling address carried in the message is 10.20.2.20

If GK returns an ACF message to terminal A, the call signaling address carried in the message is 10.20.2.100

If GK returns an ACF message to terminal A, the call signaling address carried in the message is 10.10.1.100

If GK returns an ACF message to terminal A, the call signaling address carried in the message is 10.10.1.200

177. Configure Huawei GK-1 and Huawei GK-2 as neighbor GKs. Terminal A and Terminal B are registered in GK-1, and Terminal C is registered in GK-2. If GK-1 enables Q931 routing, but GK-2 does not enable Q931 routing, when terminal A actively calls the number of terminal C, which of the following statements is correct?

If GK returns an ACF message to terminal A, the call signaling address carried in the message is 10.20.2.20

If GK returns an ACF message to terminal A, the call signaling address carried in the message is 10.20.2.100

If GK returns an ACF message to terminal A, the call signaling address carried in the message is 10.10.1.10

If GK returns an ACF message to terminal A, the call signaling address carried in the message is 10.10.1.200

178. Configure Huawei GK-1 and Huawei GK-2 as neighbor GKs. Terminal A and Terminal B are registered in GK-1, and Terminal C is registered in GK-2. If GK-1 does not enable Q.931 routing, but GK-2 enables Q931 routing, when terminal A actively calls the number of terminal C, which of the following statements is correct?

If GK returns an ACF message to terminal A, the call signaling address carried in the message is 10.20.2.20

If GK returns an ACF message to terminal A, the call signaling address carried in the message is 10.20.2.100

If GK returns an ACF message to terminal A, the call signaling address carried in the message is 10.10.1.10

If GK returns an ACF message to terminal A, the call signaling address carried in the message is 10.10.1.200

179. Compared with products of the same grade as ZTE and Keda, what are the main advantages of TE30?

1080p HD resolution

Number of video interfaces

12x optical zoom camera

Number of audio interfaces

180. When you forget your HD terminal username and password and cannot log in to the web interface, you can only restore the factory values.

True

False

Page 19 of 37

181. To send subtitles in T.140 mode, 9000 series high-definition terminals can only output through the HD OUT1 port.

True

False

182. The sound test in diagnosis is to test whether the terminal audio output is normal.

True

False

183. The maximum packet loss rate supported by SEC2.0

0.3

0.2

0.1

0.05

184. What kind of interface does the TE50 backplane not have?

DVI

HDMl

VGA

SDl

185. The SDI interface standard supported by the VPC620 camera is

SD-SDI

HD-SDI

3G-SDl

Everything else is wrong

186. The pickup range of VPM220W array microphone is?

90 degrees

120 degrees

360 degrees

None of the others

187. How many venues can a single VP9630 connect to at most?

120

188. The default working mode of the GE1 port of the MCU is?

Riding on the fence

Capture packets

Backup

Dynamic switching

189. In the MCU's WEB page, the format of the exported address book information is?

vcf

xml

dat

cap

190. If the terminal accidentally drops the meeting during the meeting, you can join the meeting by calling the special service number

True

False

Page 20 of 37

191. MCU supports how many web users to log in at the same time?

3 _

Multiple

192. The anti-packet loss protocols supported by ViewPoint 96XX are?

SEC1.0, SEC2.0, SEC3.0, PLC

SEC2.0, SEC3.0, PLC

SEC1.0, SEC2.0, PLC

193. Which device is the concept of SMC2.0 resource pool based on?

SMC2.0

MCU

Terminal

194. What is the architecture of SMC 2.0?

C/S

B/S

C/S and B/S mixed

Everything else is wrong

195. When a new user logs in to SMC2.0 for the first time, he cannot successfully jump to the password modification page. Which of the following are possible reasons?

The IIS service on the server is not enabled

The https function on the SMC server is not enabled

The client cache of the Internet Explorer browser on the server is not cleared.

The "Compatibility View Settings" of Internet Explorer on the server are incorrect.

196. In the 2010 version of the MSUC solution, which of the following points about the point-to-point conference application scenarios are wrong?

Support video pause and resume on Lync and terminal

Support online status (online, busy, offline)

Supports integration with AD, searches contacts online, and saves them to the terminal’s local address book

When the video terminal calls Lync, it can only call the other party’s number.

197. When accessing a designated conference through IVR, the IVR unified access number of the 96XX series MCU defaults to ()

168

5000

8000

9000

198. IVR can be understood as an interactive method that guides users to join a target meeting or create a meeting.

True

False

199. When a private network terminal uses static NAT to traverse public and private networks, how will the SRC address of the private network terminal change?

No change

Convert to NAT export address

Convert to any available public network address

Convert to GK address

200. The H460 protocol stipulates the public and private network traversal processing which process of the H323 media stream part?

H460.18

H460.19

H460.20

H460.21

Page 21 of 37

201. In H.460 networking mode, does the private network terminal initiate a SETUP connection () during the call?

Public network terminal

MCU

202. In H.460 networking, how is the code stream hole between the public network and private network terminals maintained?

IRQ heartbeat message

Timed keep-alive package

Initial keep-alive package

No maintenance is required. Once the channel is opened, the stream channel is established.

203. Which layer of the four-layer network structure does NAT mainly work on?

Data link layer

Network layer

Application layer

Transport layer

204. Dynamic NAT mapping can convert multiple private network addresses into one public network address, or it can convert multiple private network addresses into multiple public network addresses.

True

False

205. In the H.460 signaling interworking solution, public and private network terminals establish connections with TS through SETUP messages respectively.

True

False

206. Public and private network traversal is related to the number of ports and channels used by the protocol. How many channels need to be opened for a standard H.323 number calling process?

207. Assuming that there are no port restrictions on NAT1 and NAT2, if T5 is to be registered on GK, which of the following methods is correct?

T5 needs to be assigned a public network address.

GK’s IP address needs to be mapped to the public network address on NAT1

Unable to achieve

No configuration required

208. TP3118S can accommodate how many number of participants?

209. Which output interfaces in slot 9 of the telepresence host should be connected to the three left, middle and right TV sets of TP3106 respectively ()

1, 2, 3

2, 1, 4

1, 3, 2

3, 2, 1

210. TP3106 weak current cable should be routed at the bottom of the rack

True

False

Page 22 of 37

211. What audio technology does Huawei Telepresence system rely on for touch-screen voice control switching?

Binaural

Three channels

Mono

Number of MICs

212. When installing three three-screen telepresence TVs, which of the following are required to be installed first?

TV on the left

Central Television

TV on the right

No requirement

213. Before compression and encoding, one frame of a 1080P image occupies 47Mb of storage space, so what is its color bit depth?

24bit

16bit

48bit

64bit

214. In the VoIP system, good call results can be guaranteed only when the end-to-end network delay is lower than ().

50ms

250ms

400ms

500ms

215. Which of the following parameters does not belong to the content of the SDP media line?

media

port

transport

network address

216. In the converged conference 3.0 solution, regardless of whether the multimedia cascade mode or the MCU center mode is used, all audio and video media streams of the Web client require proxy forwarding by the USM/MS system.

True

False

217. Regarding the local regeneration function, which one of the following is incorrectly described?

The central node and the local node are interconnected through SIP trunks

The central node and the local node use a heartbeat mechanism to monitor the running status of the peer device.

Under normal circumstances, the IP phone of the local node is registered at the central node

The POTS phone of the local node is registered with the local node itself.

218. Which of the following factors will affect the clarity of the image?

Color space mode

Degree of noise reduction

Contrast

Saturation

219. Regarding MCU cascade, which of the following descriptions is wrong?

MCU cascade is divided into manual cascade and automatic cascade.

Manual cascading requires scheduling two conference templates

Automatic cascading does not require configuring cascaded sites.

Manual cascading must configure GK routing

220. The use of white balance technology is to adjust the color circuit inside the camera to offset the color cast of the captured image under different light source conditions and restore it to a visual habit closer to the human eye.

True

False

Page 23 of 37

221. When installing the three-screen telepresence TP3218 in Xinhai, the switch must be divided into two VLANs.

True

False

222. Which of the following descriptions of the calling call set is correct?

When initiating a calling call set, SC uses UDP port 700 to listen for messages.

When initiating a calling call set, SC uses TCP port 700 to listen for messages.

When initiating a calling call set, the terminal uses UDP port 700 to send messages.

When initiating a calling call set, the terminal uses TCP port 700 to send messages.

223. Which of the following descriptions about IP phones and analog phones in the U1900 system is correct?

If you want to successfully register IP phones A and B to the U1900 system, the U1900 system must contain an MTU board.

When IP phones A and B have been successfully registered to the same U1900 system, if IP phones A and B are to be able to dial each other, the U1900 system must contain an MTU board.

When IP phones A and B have successfully registered to the same U1900 system; if IP phone A calls |P phone B, IP phone B is busy, then if IP phone A needs to hear the busy tone, Then this U1900 must contain an MTU board.

If IP phone A and analog phone C (directly connected to the ASI board of U1900) are successfully registered to the U1900, when IP phone A and analog phone C have a call, the U1900 system does not need to contain the MTU board.

224. [Notice] 2015-11-2501:59:55 main 2589173 Null [EXPARA: 11<CPUID=Ox0>] string: [diagnose][reboot]Reboot MCU at midnight

This log indicates why the MCU restarted?

CPU usage is too high

CPU temperature is too high

Manual Reboot

225. Which of the following methods cannot be used to back up and restore the U1900 system version?

Putty+FTP server

Putty+TFTP server

eSight

LMT

226. In Fusion Conference 3.0, how can the conference terminal query the conference list?

eSpace Desktop queries the USM scheduled meeting list through the ECS server.

The eSpace 8950 phone directly queries the conference list reserved in USM through the USM system.

The TE terminal queries the conference list reserved by the USM through the SMC system.

The eSpace 8950 phone queries the USM reserved conference list through the ECS server.

227. The terminal needs to determine the media transmission destination address before transmitting video information. Which signaling of H.245 completes this process?

Capability Negotiation

Master-slave decision

Open logical channel

Close the logical channel

228. Clarity is a measure of the clarity of an image seen by the human eye, and resolution is a measure of the number of pixels on the screen; the higher the resolution, the higher the clarity.

True

False

229. The attributes of the message body are described through the Content header field. Content-Length refers to the length of the message body. It is not necessary for TCP but is necessary for UDP.

True

False

230. Which of the following protocols is used to communicate between SMC2.0 and devices (such as conference venues and MCUs) to achieve device management?

TCP

SNMP

323

Page 24 of 37

231. To achieve point-to-point interoperability between TE30 located on the private network and TE Desktop located on the public network, which of the following practices is incorrect?

SC is deployed in a fence-riding manner.

TE30 uses

323 and SIP dual registration methods.

TE30 only uses

323 registration method.

In single SC networking, TE30 enables

460 service.

232. H.225 is used for media channel control, including call signaling (Q.931), and RAS messages between nodes and GK.

True

False

233. In multi-channel cascading, how many cascade channels can two MCUs support at most in one conference?

234. Which of the following descriptions of IP phone configuration is incorrect?

The phone can automatically allocate numbers through esight.

You only need to allocate numbers on the U1900 series unified gateway, and do not need to set it on the phone.

The account password on the phone needs to be consistent with the account password on the U1900 series unified gateway, and the user cannot modify it.

The "SIP server" on the machine needs to be configured as the address of the U1900 series system-gateway.

235. Which of the following descriptions of the advantages and disadvantages of packet loss retransmission ARO are correct?

ARQ has high latency requirements and is difficult to use on existing networks. It is only effective in small packet loss scenarios and will aggravate image jitter.

ARC basically does not occupy bandwidth resources and has little impact on image quality.

ARQ adds redundant data, occupies a certain bandwidth and reduces the video effect. There is no way to deal with sudden packet loss, and there will be a certain delay.

ARQ can recover packet loss data with a certain probability through group combination verification, which is more effective for general packet loss scenarios.

236. The U1900 series unified gateway does not have a factory default IP address, and the IP address needs to be configured through the console line.

True

False

237. The terminal performs remote video loopback to confirm whether the video data is transmitted normally on the network.

True

False

238. When configuring an automatic switchboard on the U1900 series unified gateway, if the intra-office short number is 5 digits long, in order to prevent fraudulent calls, the administrator should configure the extension number to be no longer than 4 digits.

True

False

239. Which of the following descriptions of TEXO functional characteristics is correct?

Voice calls support Chinese and English

The terminal’s configuration interface can be directly operated through voice recognition.

Supports wireless content streaming, but does not support sending content through a network cable connected to a terminal.

Everything else is correct

240. In video conferencing, which of the following audio protocols works best?

711

722

728

AAC_LD

Page 25 of 37

241. Regarding the relationship between auxiliary streams and H.239, which of the following descriptions is correct?

AH239 is the auxiliary stream

BH239 is an independent protocol processing process and has no connection with other protocols (such as H.323, SIP)

C. In video conferencing, the H.239 protocol specifies all auxiliary stream processing processes

D. Sub-streaming is a service, and H.239 is an interactive protocol used for sub-stream negotiation.

242. According to the gkRejGkNoEnoughRegTable in the GK log, the possible reason for GK’s refusal to register is?

When SwitchCentre defines the terminal as using password authentication, the password provided when the terminal initiates a registration request to SwitchCentre is incorrect.

Network segment bandwidth restrictions are configured on SwitchCentre.

Non-standard terminals register with SwitchCentre. The registration signaling is illegal and fields are missing.

The number of nodes registered on SwitchCentre has reached the value specified by the license.

243. Accept the message sent by the terminal to the gatekeeper about the gateway requesting deregistration. Which signaling can achieve this function?

GRQ

RRQ

URQ

ARQ

244. Among the following RAS messages, which one enables the gateway to initiate user access authentication and address resolution requests to the gatekeeper?

RRJ

GRJ

URJ

ARJ

245. In the H.323 protocol, the message sent by the called party to the calling party and indicating that the called party has picked up the phone is?

alerting

proceeding

setup

connect

246. During a point-to-point call under different GKs, the LRQ request message queries the neighbor GK for the information of the called node through the GK routing prefix.

True

False

247. When scheduling a conference cascade of two MCUs, the upper/lower MCU joins the conference as a virtual conference site.

True

False

248. Network segment bandwidth limitations may cause terminals to fail to register with GK.

True

False

249. The capability of a certain terminal declares two combined capabilities: one is (H.261, H.263)/(G.711, G.723, G.7281), and the other is {(H.264}/ {G.711}}, which of the following video and audio combinations is sent, the terminal will not be able to process it normally?

H264/G711

H261/G711

H263/G728

H264/G723

250. After receiving a SIP request, it is the function of which server to map the requested address to zero or more new addresses and return these new addresses to the client?

Proxy server

Location server

Redirect server

Registration server

Page 26 of 37

251. Which of the following SIP message transactions has a three-way handshake?

Invite

Information

Refer

Message

252. The clear and fluent strategy only applies to the () protocol.

h.261

h.262

h.263

h.264

253. The software format for high-definition video terminal upgrade is?

.txt

.dat

.tkn

.tp4

254. Which of the following descriptions about high-definition terminals is correct?

HD video terminals cannot communicate with SD video terminals

HD video terminals must be registered to GK to communicate

The high-definition video terminal supports remote control of the camera

The password for the HD video terminal WEB page cannot be empty.

255. Remote video loopback is to confirm whether the video data is transmitted normally on the network and to determine whether the remote video module is working normally.

True

False

256. Which of the following does not belong to camera 3A technology?

Automatic exposure

Automatic noise reduction

Auto white balance

Auto focus

257. TE30 supports video codec specifications up to?

1080P60

1080P30

720 30

4CIF

258. Wireless streaming is a method of installing software on a PC to send PC desktop encoding to a high-definition terminal. Which of the following methods cannot use wireless streaming?

The TE terminal is the AP, and the PC is directly connected to the terminal via WIF

The PC connects to the terminal network port through an Ethernet cable

The PC is connected to the AP router wirelessly, and the AP router network cable is connected to the terminal network port.

PC accesses the Internet through 3G, and the terminal is deployed on the enterprise's internal network without any mapping.

259. Which of the following technologies does VME not include?

Face recognition

frame doubling

SEC3.0

Motion detection

260. Which of the following terminal models have a DisplayPort interface?

TE30

TE40

TE50

TE60

Page 27 of 37

261. When managing MCU via WEB, among the export items under the device management interface, which of the following items cannot be exported?

Address book

license

Gateway/MCU

Status table

262. The switch network port connected to the MCU must be 100M half-duplex.

True

False

263. When using the MCU fence mode, there is no need to add other public and private network traversal equipment.

True

False

264. When the MCU is working in the fence mode, GEO is registered to the SwitchCentre, and GE1 can only support IP address calls.

True

False

265. Multi-channel cascade supports automatic speed reduction function.

True

False

266. The MCU's built-in WEB includes multi-user management, address book management, conference management and device management.

True

False

267. The MCU's built-in WEB can also manage other MCUs besides this MCU.

True

False

268. Users can enter the conference hall by calling the IP address of the MCU, and create a video VR conference according to VR prompts.

True

False

269. For a three-level automatic cascading conference, the conference administrator needs to schedule at least the number of conferences?

270. When MCU is in fence mode, () needs to be registered to GK?

GE1 port

GE1 port or GE0 port

GE1 port and GE0 port

GE0 port

Page 28 of 37

271. NLOG supports viewing the historical network data of the event venue within the conference.

True

False

272. Which of the following is the default user in the SMC2.0 system?

user

admin

debug

trace

273. In the MSUC solution, the video protocol used for point-to-point interoperability between Huawei TE terminals and the 2010 version of Lync soft terminal is?

264 CIF

263CIF

264HP720P

RT Video

274. Huawei video network recording and broadcasting solution, which description of the recording and broadcasting server is incorrect?

During the meeting, users can watch the meeting through a PC browser, similar to a live broadcast.

After the meeting, users can watch the meeting recording saved on the recording server through the PC browser.

The recording and broadcasting server supports encoding and decoding functions.

The recording server can record and on-demand MCU media streams.

275. Which statement is correct about Huawei’s video network recording and broadcasting solution?

Only the SMC interface and telepresence central control interface can control recording and playback.

The terminal recording and broadcasting request will be sent to the MCU, and then the MCU will perform unified recording and broadcasting operations.

When the meeting ends, the recording server will return the recording address to SMC, and SMC will notify the user via email to watch on-demand.

Support point-to-point recording and local recording

276. Regarding Huawei’s supporting network recording and broadcasting function, which of the following statements is correct?

Huawei network recording can record a 3-screen telepresence venue. This is achieved by forwarding the 3 streams of the 3 screens to the recording server through the MCU at the same time.

When watching Huawei network recording on demand, you can switch between the main stream and auxiliary stream screen layouts through the playback software. These layouts are encoded in advance by the MCU and then sent to the recording server.

For all meetings, Huawei network recording server can choose on-demand HD or SD when on-demand.

Everything else is wrong

277. The H.460 protocol stipulates the public and private network traversal processing of the H.323 signaling part?

AH460.18

BH460.19

CH460.20

DH460.21

278. In a static NAT network, which is the wrong description of the signaling between a public network terminal and a private network terminal?

Callee CS addr is the NAT address

Caller CS addr is the NAT address

The DST address of the public network terminal is the NAT address

The DST address actually processed by the firewall is the private network terminal address.

279. Regarding the application of H.460 protocol in video services, which of the following descriptions is wrong?

The TCP channel is established by the private network terminal

The call signaling of public and private network terminals adopts standard

323 call signaling.

When the call is established, a regular keep-alive packet is required to maintain code stream holes.

After the channel is established, the private network terminal directly exchanges "connect" messages with the public network terminal to establish a connection.

280. When using H.460 dual-machine traversal networking, which GK on the public network needs to be configured?

460 server routing

Private network GK routing

Both A and B need to be added

Neither A nor B need to be added

Page 29 of 37

281. Assume that all terminals have been registered to GK/SC, there are no port restrictions on NAT1 and NAT2, and all terminals are TE soft terminals (SIP), then the MCU holds a conference. Regarding T5 joining the conference, which of the following description is correct?

GK routing is required

Unable to communicate with each other

Can communicate directly with each other

Static NAT needs to be configured on the terminal first, otherwise it will not be possible.

282. When viewing local images on the three-screen telepresence TP3106, which camera of the three-eye camera is displayed by default on the left/middle/right screen?

Left, center, right

Right, center, left

Center, left, right

Left, right, center

283. TP3106 auxiliary stream signal is input through the desktop multi-function socket, and then directly input through which flip screen?

Telepresence host

Main telepresence encoder

Left and right telepresence encoders

284. If you want to log in to the web interface of the TP3106 terminal or telepresence host, you can use the network port on the desktop socket or a wireless router.

True

False

285. Huawei’s three-screen telepresence can send how many auxiliary streams at the same time?

Route 1

Route 2

Route 3

No restrictions

286. In lighting design, color temperature is a measure of the light color of a light source. Which of the following description is correct?

The higher the color temperature, the redder the screen color. On the contrary, the lower the color temperature, the bluer the screen color.

The higher the color temperature, the bluer the screen color. On the contrary, the lower the color temperature, the redder the screen color.

The higher the color temperature, the more realistic the image color reproduction will be.

The higher the color temperature, the higher the illumination

287. The reverberation time T60 value of a standard three-screen telepresence conference room is?

Between 0.4s~0.6s

Between 0.5s~0.8s

Between 0.3s~0.5s

Between 0.2s~0.4s

288. Regarding the converged conference 3.0 solution, which of the following statements is correct?

The eMP system queries the address book information of the video conferencing system by accessing eU

The account to log in to the eMP system needs to be created in the eMP system

The eMP system obtains the UC system address book information by accessing the BMU system.

eSpace Web queries the address book information of the video conferencing system by accessing eUA

289. When adding a TE terminal in manageable mode on SMC 2.0, it prompts "The user name or password of the device is incorrect." Which is the possible reason?

When adding a venue in SMC 2.0, the authentication password configured in the authentication information is inconsistent with the password of the terminal test web management account.

When adding a participant on SMC 2.0, the read group name configured in the SNMP V2C search option is inconsistent with the SNMP configuration on the terminal.

When adding a venue to SMC 2.0, the authentication password configured in the authentication information is inconsistent with the password of the API account on the terminal side.

When adding a conference site on SMC 2.0, the user name and authentication password configured in the SNMP V3 in the search options are inconsistent with the terminal SNMP configuration.

290. The default address of the GEO port of the RSE6500 recording and broadcast server is 192.168.2.1, and the default address of the FE port is 192.168.1.1

True

False

Page 30 of 37

291. The terminal performs remote audio loopback, and the audio code stream has been encoded and decoded by the remote audio module.

True

False

292. An enterprise's current network has deployed eSight network management, DNS server and DHCP server. Now it is deploying 200 additional IP phones. Which of the following methods cannot configure TRO69 parameters in batches?

Configure the mapping between eSight domain name and IP address in the DNS server.

Batch delivery through DHCP Option246 field

Using access scanning

Through the web configuration interface of IP Phone

293. In the video system, the MCU, T1, and T2 are deployed on the private network, and T3 is deployed on the public network. The MCU is used as a wall-mounted network. Which of the following statements is incorrect?

The GEO port of the MCU is registered to the GK, and the GE1 port is only used for IP address calls.

Connect T2 to the same network segment as the GEO port of the MCU

Connect T3 to the same network segment as the GE1 port of the MCU

The network connected to the GEO port and GE1 port of the MCU can be on the same network segment.

294. A transaction (Transaction) contains several parts, which part is not necessary?

A request message

ACK

A final response

Zero or more provisional responses

295. Which of the following descriptions about the IP address query method of eSpace 7900 series phones is incorrect?

Press the "Network Settings" soft key on the phone's LCD login interface and select "Status" to query.

You can query it through "Application->Status" on the phone's LCD main interface.

After querying the current address, you can use the administrator account to log in to the web interface to query.

If the registration is not successful, it can only be queried through the phone LCD interface.

296. VP96 series MCU supports login through RS-232 serial port. When logging in, what baud rate needs to be set to?

9600

115200

2400

19200

297. To centrally deploy and upgrade eSpce iP phones using DHCP option 246, a DHCP server must be deployed, and an HTTP server is optional.

True

False

298. H.264 video divides images into three types of frames: P and B. Among them, frames use inter-frame coding, and P frames use intra-frame coding.

True

False

299. H.323 can only be applied on IP networks.

True

False

300. There are two ways to record phone calls: automatic recording and passive recording.

True

False

Page 31 of 37

301. Which of the following is not a disadvantage of forward error correction?

Occupies more bandwidth

Reduce video effects

There is a certain delay

Add image dithering

302. Analog phone A is registered to a U1960 unified gateway through the IAD agent. If A is talking to user B, another IP phone registered under this U1960, and U1960 is unexpectedly powered off, the call between A and B will be interrupted immediately.

True

False

303. The function of the proxy server is to forward requests or responses for clients. It can act as both a server and a client to determine the next hop to forward request messages.

True

False

304. In the U1900+SC solution, which description of the docking configuration is correct?

All MCUs in the VC system need to establish SIP trunk connection with the U1900.

The SC in the VC system needs to establish SIP trunk connection with the U1900.

All MCUs in the VC system need to establish H323 relay connection with U1900.

The SC in the VC system needs to establish H323 trunk connection with U1900.

305. Which of the following modes does the eSpace phone support so that a PC can receive the phone's back-end PC port and share the network connection?

Routing

Bridge

Exchange

Commissioning

306. Which one of the following descriptions about the license of RSE6500 is wrong?

The live broadcast resources in the license of RS6500 are based on 720P30 as the basic unit. If the resource is smaller than 720P30, it will also occupy 1 resource.

The recording resources in the RSE6500 license are only related to the number of recorded conferences and have nothing to do with the specific conference format.

If the mainstream video conference format is 1080P60, 4 live broadcast resources will be occupied for conference recording.

If the mainstream video conference format is 720P60 and the streaming format is 720P30, 2 live broadcast resources need to be occupied for conference recording.

307. Which of the following descriptions about multi-node centralized networking is correct?

U1981 cannot be used as a branch node.

All types of users on the local node are synchronized from the central node.

The license information of the central node and the local node can be viewed on the central node.

The number of users of a local node registered on the central node cannot be greater than the number of License users.

308. Video IVR is based on audio IVR and adds a video interactive interface, which can more conveniently and intuitively guide users to join or create meetings on the terminal side.

True

False

309. The SR message in RTCP is a sending report, which is used to send and receive statistical data from the sending gateway.

True

False

310. RTP protocol is a network transmission protocol that provides feedback on data transmission quality and can perform traffic and congestion control on other transmission protocols.

True

False

Page 32 of 37

311. In H.460 networking, which of the following devices initiates and establishes a TCP connection?

Public network terminal

Private network terminal

The other three options are incorrect

312. What is the upper limit of media traversal traffic of SMC2.0 built-in SC?

100Mbits/s

60Mbits/s

300Mbits/s

1Gbits/s

313. In the SIP protocol, which of the following contents are not necessary for the request message?

Request line

Response line

Header field

Message body

314. Which of the following descriptions of the H.460 signaling interoperability solution are correct?

The public network terminal sends ARQ messages to the private network using the standard

323 protocol.

TS sends a standard SCI message to the private network terminal to inform the public network terminal to call itself.

The private network terminal is responsible for establishing the TCP channel with the T

After the channel is established, the private network terminal directly communicates with the public network terminal and establishes a connection.

315. In the H.460 public-private network traversal network, which one is wrong in the description of the public network terminal calling the private network terminal?

The public network terminal sends ARQ messages to the private network using the standard

323 protocol.

TS (traversal server) sends a standard SCI message to the private network terminal to inform the public network terminal that it is calling the private network terminal.

The private network terminal is responsible for establishing a TCP channel with the TS (traversal server).

After the TCP channel is established, the private network terminal directly sends a Connect message to the public network terminal to establish the connection.

316. Which of the following descriptions about the characteristics of single-node networking is correct?

Analog phones, fax machines, IP phones and SoftPhone terminals can all be directly connected to the unified gateway through the IP network.

The unified gateway of a single-node network can be connected to the PSTN through a relay.

It is recommended that large enterprises with multiple branches deploy single-node networking.

The master node of a single-node network does not support master-slave dual-node operation.

317. PCM coding mainly includes three processes: sampling, quantization, and encoding.

True

False

318. The rules for using cascading channels are: occupy according to priority. When the priorities are the same, resources are mutually exclusive.

True

False

319. The network diagnostic tool supports remote diagnosis mode, that is, the network diagnostic tool can remotely control another network diagnostic tool to initiate network diagnosis for other network diagnostic tools.

True

False

320. After the video conference is successfully held, the video terminal will not send any more frames.

True

False

Page 33 of 37

321. Regarding the AAC_LD speech coding method, which of the following statements is wrong?

Delay less than 20ms

The sound quality at the same bit rate is better than G711, G722, G722.1 (C)

Supports multiple code rates, supports CBR and VBR

The amount of operation is greater than AAC_LC

322. If you want to hold a video conference system that supports dual 1080P 30fps and the auxiliary stream is a moving image, and supports auxiliary stream adaptation, which of the following product combinations is the best choice from the perspective of video conference effect?

VP9039S+VP8660

VP9039A+VP8660

VP9039A+VP9660

VP9039S+VP9660

323. In the Huawei GK component, the number table composed of GK and neighbor GK prefix numbers is called the GK routing table.

True

False

324. In the H.323 framework protocol, what is the role of the RTCP protocol?

Stream transmission

Call signaling

Capability set

Transmission Control

325. Among the following protocols, the protocol that can implement video encoding and decoding is ()

225

239

245

261

326. H.323 protocol can only be applied in IP networks.

True

False

327. During a point-to-point number call, H.245 will perform capability set negotiation before opening the logical channel.

True

False

328. After the terminal initiated a call and sent an ARQ message to GK, it received an ARJ. Which of the following possible reasons are incorrect?

The called person is offline

The called person refused to answer the call

Insufficient call bandwidth

Being called busy

329. A 4-point 1080P30 conference with secondary stream has been held on VP9630 with 8-port 1080P30 license. How many 720P30 conference sites can the MCU be connected to at most?

330. The terminal auxiliary IP is designed to allow users to log in to the terminal for configuration or debugging within the LAN, and can be used for main services.

True

False

Page 34 of 37

331. The principle of convening a conference using the built-in MCU of the terminal is that the built-in MCU terminal establishes a connection with each terminal separately.

True

False

332. Which of the following interfaces can transmit video and audio signals at the same time?

DVI

HDMI

VGA

S-video

333. Which of the following is not the video input port of the 9000 series HD terminal?

SD IN

HD IN

S-VIDEO

AUDIO IN

334. Use 9630MCU to hold an automatic multi-view conference. When 5, 6, 7, or 8 conference sites join the conference, how many multi-view sub-pictures are seen?

5678

6789

4567

4566

335. The number of multi-picture resources of 8650MCU is 5 H264 CIF encoding and 20 H264 CIF decoding. At most () four-picture H264720P protocol conferences can be held through this MCU.

336. How many SMCs can one MCU support at most?

337. H.264 encoded video frames have three types: () () ()

A, Q, P

B, I, P

C,Q,B

T, C, B

338. MCU is located in the () layer of the video system

User access layer

Network control layer

Media switching layer

Operation support layer

339. When the MCU works in fence mode, GEO and GE1 must be in two different network segments, and the GEO (or GE1) of all boards must be in the same network segment.

True

False

340. Users in the SMC 2.0 system can belong to up to () organizational structures.

No limit

Page 35 of 37

341. Basis for judging user permissions in SMC 2.0 ()

User type

The organizational structure of the user

The organizational structure of the user and user type

Everything else is wrong

342. The core of NAT mapping is to modify the header (source address) of the data packet and convert the source address into a NAT address.

True

False

343. In H.460 stand-alone network, the H.245 TCP connection of the private network terminal is established with the TS.

True

False

344. Regarding ALG’s application gateway to achieve firewall traversal, which statement is correct?

The terminal or MCU supports the ALG function

Only MCU implements ALG function

NAT device implements ALG function

GK implements ALG function

345. See Networking. Assume that all terminals have been registered to GK/SC, there are no port restrictions on NAT1 and NAT2, and all terminals are TE soft terminals (SIP). Then T3 calls T5. Which of the following descriptions is correct?

GK routing is required

Unable to communicate with each other

Can communicate directly with each other

Requires MCU routing

346. The local noise requirement of the TP3106 three-screen telepresence conference room is no greater than?

28dB

38dB

48dB

58dB

347. TP3106 switch should be divided into how many VLANs?

Everything else is wrong

348. TP3106 flip screen IP address range is 176.16.21.30~176.16.21.45.

True

False

349. TP3106 supports multiple networking methods such as IP, E1, 4E1, etc.

True

False

350. In addition to the touch screen, TP3106 can also control the power switch of the device through the telepresence host web interface.

True

False

Page 36 of 37

351. In the TP3206 telepresence system, which of the following devices requires a relay to control power on/off?

Telepresence host

Flip screen

Speaker

352. A company deploys the U1900 series unified gateway as a voice switching system. Regarding the call permission characteristics of employee A and employee B, which of the following statements is correct?

If employee A is granted default permissions, employee A can only make local calls during working hours.

If employee B is granted general permissions, employee B can only make local calls during working hours.

If employees A and B are given default permissions, both employees A and B can make domestic long-distance calls during working hours.

If employee A is granted default permissions and employee B is granted normal permissions, employees A and B can make local calls at any time.

353. The U1900 series unified gateway is connected to the PSTN through a trunk. The default outbound call permission of this trunk is "LOCAL".

True

False

354. In the SIP protocol, the Cancel transaction can be used to cancel the Update transaction.

True

False

355. Regarding the advantages of MCU cascade networking, which of the following statements is wrong?

The port capacity of a single MCU is insufficient. Cascading increases the capacity.

The central MCU line bandwidth is insufficient, and cascading reduces bandwidth requirements.

Implement device partition management

Enhance meeting security

356. Among the following types of boards, which function of U1960 interfacing with PSTN can provide?

Scu

AST

MRS

oSu

357. Regarding the H.225 call signaling process, which of the following messages are in the wrong order?

setup/call proceeding/connect/alerting

etup/alerting/connect

setup/alerting/release complete

setup/call proceeding/alerting/connect

358. Among the SIP response messages, the messages numbered 300-399 belong to which of the following types of messages?

Success

Redirect

Client error

Server error

359. When deleting the MCU, SMC2.0 prompts "The MCU is an access MCU and cannot be deleted." Which of the following methods can correctly delete the MCU?

Modify the connection method on the MCU to make the MCU offline on SMC2.0.

Enter the service area configuration on SMC2.0 and delete the corresponding service area configuration.

On SMC2.0, enter the conference configuration and select "None" for the access MC

Disable GK on the MCU and make the MCU offline on the GK of SMC2.0.

360. In the RTP message, the initial value of the Sequence number is random. Every time an RTP data packet is sent, the sequence number is incremented. The receiving end detects packet loss and reconstructs packets based on it.

True

False

Page 37 of 37

361. Direct interoperability of data and auxiliary streams has been realized in the converged conference

True

False

362. Which of the following devices does not support the built-in GK function?

VP8650

VP9660

VP9650

VP9630

363. In the U1900+SC solution, conference reservation can be made through SMC2.0, and the IP phone terminal can be added to the reserved conference.

True

False

364. In a six-point conference held using the VP96 series MCU, the conference sites T1, T2, and T3 formed a three-screen. The conference sites T4, T5, and T6 were not in the multi-screen. When T1 and T2 hung up and left the conference, two of them, T4, T5, or T6, A single site cannot replace the T1 and T2 sites in multi-presence.

True

False

HCIE-Collaboration (Written) V2.0 H11-879_V2.0 Exam Actual Questions

HCIE-Collaboration (Written) V2.0 H11-879_V2.0 Exam Actual Questions

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