New Updated H12-321 Exam Training Material

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1. When the air interface frame is a management frame, how many bits are the ESS and IBSS in the Capability Info field of the management frame that can determine the device is a wireless bridge?

2. According to the detection results reported by the AP, the AC can obtain the neighbor relationship between the AP and the surrounding devices, as well as the neighbor relationship of all radio frequency devices under the entire AC including legal APs, illegal APs, and non-Wi-Fi interfering devices, as shown in the following figure:

In order to prevent the reported data from being too large, only the legal neighbors with signal strength greater than -85dBm and illegal neighbors with signal strength greater than () dBm are reported here.

-75

-80

-85

-90

3. In the N+1 backup network as shown in the figure, AC3 is the backup AC of AC1 and AC2, the number of APs that are online on the main AC1 is 1024, the number of configured APs is 2048, and the number of APs that are online on the main AC2 is 512. Normally, what is the minimum number of APs allowed to access on AC3, and what is the minimum number of APs allowed to be configured on AC3?

2048, 1024

1024, 2048

3072, 512

1024, 2560

4. As shown in the figure, in the Mesh network, which STP spanning tree protocol needs to be enabled?

AC G0/0/1 interface

MPP

Switch

5. As shown in the figure, a point-to-point link with a length of 3km, and an office building with a height of 9.1m from the ground at the midpoint of the link, if the signal transmission frequency is 5.8GHz, please refer to the following formula according to the actual situation, what is the minimum installation height of the transmit and receive antenna from the ground?

9.1m

10m

13m

18m

6. Which one of the following four scenarios does not belong to the Mesh network?

(a)

(b)

(c)

(d)

7. As shown in the figure, in a large enterprise WLAN network, the company's network administrator recently discovered that the WLAN network traffic was abnormal, and the ping gateway was delayed or a large amount of packets was lost. After excluding other possibilities, it was suspected of being an illegal network attack. Which of the following illegal attacks is most likely?

Flood attack

Spoof attack

Weak IV attack

Brute force cracking

8. As shown in the figure, a point-to-point communication link with a length of 10km, a tree with an obstacle height of 12.2m in the link, and a distance between the tree and one of the antennas is 4km, calculate the radius of Fresnel zone at 4km, if the signal transmission frequency is 5.8GHz, refer to the following formula according to the actual situation, what is the minimum installation height of the transmit and receive antenna from the ground?

9. In the network shown in the figure below, the data traffic before roaming is forwarded as STA-HAP-HAC-upper network. After layer 2 roaming, what is the direction of data forwarding traffic?

STA-FAP-FAC-HAC-Upper Network

STA-FAP-FAC-HAC-HAP-HAC-upper network

STA-FAP-FAC-Upper Network

STA-FAP-FAC-HAC-FAC-Upper Network

10. According to the process of Mesh connection establishment, which of the following steps are correct?

4->3->2->1

4->2->3->1

2->3->4->1

2->4->3->1

Page 2 of 9

11. Which of the following is correct about the Earth curvature formula?

12. As shown in the figure, what is the load sharing method of the dual-system hot backup solution?

13. As shown in the figure, in the dual-link cold standby load sharing network, AP1 is a newly online AP, and both the two ACs have access configurations, which AC will AP1 choose for access?

AC1

AC2

Random access

No access

14. As shown in the figure, in public places, such as different companies on adjacent floors in an office building, there are multiple SSIDs. After a company turns on the WIDS illegal device counter function, it will counter the AP of other companies. Which of the following function can effectively solve this problem?

Dynamic blacklist function

WIDS countermeasure mode switching

WIDS counterfeit SSID detection

WIDS whitelist function

15. As shown in the figure, in order to avoid the transparent transmission of STP packets and cause loops to affect each other, which of the following does not need to enable the STP spanning tree protocol?

Only the MPP wired side interface needs to enable the STP function

Only the MP3 wired side interface needs to enable the STP function

Both MPP and MP3 wired side interfaces need to enable STP function

MP1 and MP2 need to enable STP

16. As shown in the figure is the WIDS attack detection process. After the dynamic blacklist is issued, how will the AP handle different data traffic when it is in the blacklist penalty period?

Forward normal data traffic and discard attack traffic

Discard normal data traffic and report attack traffic

Forward normal data traffic and report attack traffic

Discard normal data traffic and discard attack traffic

17. As shown in the figure, there are 4 online STAs (STA1-STA4) under AP1 radio frequency, and 1 online STA (STA5) under AP2 radio frequency. The load balancing start threshold 5 is exceeded, and the maximum number associated users supported by AP1 and AP2 radio frequencies is 10, and the configured load difference threshold is 10%.

When STA6 initiates a request to AP1 for the first time, which of the following statements is correct?

AP1 is first calculated according to the load balancing algorithm, and STA6 is allowed to access

AP1 is calculated according to the load difference threshold algorithm first, and STA6 is allowed to access

AP1 is first calculated according to the load balancing algorithm, and STA6 is denied access

AP1 is calculated based on the load difference threshold algorithm first, and STA6 is denied access

18. In the network shown in the figure, how is the route selected from A to D in the pro-active mode?

A-MPP-D

A-B-D

A-B-C-D

A-D

19. In the network shown in the figure below, the data traffic before roaming is forwarded as STA-HAP-HC-upper network, and the forwarding method is tunnel forwarding. After three-layer roaming, what is the direction of data forwarding traffic?

STA-FAP-FAC-HAC-Upper Network

STA-FAP-FAC-HAC-HAP-HAC-upper network

STA-FAP-FAC-Upper Network

FAP-FAC-HAC-FAC-Upper Network

20. In the network as shown in the figure below, the data traffic is forwarded as STA-HAP-HAC-upper network before roaming, and the forwarding method is direct forwarding, and the home agent is configured on the AC. After three-layer roaming, what is the direction of data forwarding traffic?

STA-FAP-FAC-Upper Network

STA-FAP-FAC-HAC-FAC-Upper Network

STA-FAP-FAC-HAC-Upper Network

STA-FAP-FAC-HAC-HAP-HAC-upper network

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21. As shown in the figure, in a dual-link load balancing hot backup network, AP1 is a newly online AP, and both ACs have access configurations, which AC will AP1 choose for access?

AC1

AC2

Random access

No access

22. In a WLAN network, the AP group is named ap-group and the WIDS template is wids. Now you need to enable the WIDS device counter function to counter APs with counterfeit SSID=huawei. As shown in the figure, which of the following configuration is correct?

1>2>4

5>2>3

1>2>3

5>2>4

23. The following figure shows the mesh configuration process. What should be filled in for 5, 7, and 10 respectively?

Quote Mesh template, configure Mesh whitelist, configure Mesh template

Configure Mesh whitelist, configure Mesh template, quote Mesh template

Configure Mesh template, quote Mesh template, configure Mesh whitelist

Configure Mesh whitelist, quote Mesh template, configure Mesh template

24. As shown in the figure, regarding the active/standby mode of the dual-system hot backup solution, which of the following statements is wrong?

VRRP can be applied to active/standby backup and load sharing

The selection of dual-system hot backup master and backup devices is consistent with the selection of VRRP group master and backup devices

The active/standby status of the HSB active/standby backup group is consistent with the VRRP active/standby status

For the same AP associated with the active and standby ACs, the WLAN-related service configuration must be consistent. Otherwise, the normal operation of the AP cannot be guaranteed after the AC's active and standby status is switched

25. If a small conference room with a maximum of 90 people is equipped with 3 APs, by configuring CAC on each AP, the number of users cannot exceed 30, and the SSID will be hidden after exceeding, which can indirectly achieve the effect of load balancing among APs.

True

False

26. Regarding the precautions for configuring HSB main and backup services, which of the following statements is wrong?

If you want to modify, you need to delete the HSB active and standby services first, and then reconfigure

Only after enabling the dual-system hot backup function, the configured HSB active/standby backup channel parameters will take effect

After the configuration is complete, you can modify the HSB main and backup channel parameters

After the configuration is complete, you cannot directly modify the HSB main and backup channel parameters

27. Regarding the relationship between the two technologies of 802.1x and RADIU S, which of the following descriptions is correct?

802.1x and RADIUS are different names of the same technology

802.1x is a technical system, which includes RADIUS

802.1x and RADIUS are different technologies, but they are often used together to complete the access control of end users.

802.1x and RADIUS are two completely different technologies, and they are usually not used together

28. In the WLAN outdoor long-distance point-to-point communication, if a stable communication link is to be maintained, what percentage of the first Fresnel area generally cannot be blocked?

0.2

0.4

0.5

0.6

29. In the load balancing mode, which of the following regarding the statement about the processing method of hot backup by RADIUS/Portal server is correct?

Account and authenty the NAS-IP-Address and accounting session-id filled in the backup packet

The srcip in the Radius packet sent by the AC needs to be the same, and the COA/DM device address configured in the Radius server can be different from one to the other

In the case of DOWN/uplink interruption of the original master node, the COA/DM message received by the node needs to be processed and synchronized to the opposite end, and the master device needs to issue authorization information to the AP

When the original master node, not the whole machine down/uplink is interrupted, the backup node also configures a Loopback interface with the same IP as the master node. This interface is not directly added to the IGP, but imported through import direct

30. In smart roaming, which of the following methods to identify sticky terminals is correct?

When the results of 3 consecutive detection cycles are less than the set roaming threshold

When the results of 3 consecutive detection cycles are greater than the set roaming threshold

When the results of 6 consecutive detection cycles are less than the set roaming threshold

When the results of 6 consecutive detection cycles are greater than the set roaming threshold

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31. APs in monitoring mode in the WLAN network can not only monitor peripheral devices but also forward WLAN data.

True

False

32. In the Mesh network, if the MP is connected to the wired network, it is necessary to ensure that the MP and MPP cannot communicate with each other through the wired network. Otherwise, the MPP and MP can communicate with each other through the Mesh link and the wired link. Mesh and wired The link will form a loop between MPP and MP.

True

False

33. When the air interface frame is a data frame, the DS value needs to be compared. When the values of To DS and From DS are respectively, the device type is AP?

0, 0

0, 1

1, 0

34. There are three implementations of CAC. Which of the following statements about the implementation of CAC based on channel utilization is wrong?

When the AP receives a new user online request, it first calculates the channel utilization rate on the current radio, and if the new user threshold is not reached, the new user is allowed to go online

If the channel utilization reaches the new user threshold after the new user goes online, the access request of other new users is rejected and an alarm is sent, but the SSID cannot be hidden

For the access of roaming users, check whether the channel utilization rate has reached the roaming user threshold. If it reaches, then reject the roaming user's access request and send an alarm

The AP periodically checks the channel utilization of the radio frequency, and once it drops below the threshold for new users, it sends a release alarm to allow new users to go online

35. Which of the following descriptions about Mesh routing establishment in pro-active mode is correct?

MP periodically sends broadcast PREQ, receives MP/MPP response unicast PREP, and establishes a round-trip route between any two points

MPP sends broadcast RANN periodically, receives MP and sends unicast PREQ to MPP, MPP responds to PREP after receiving it, and establishes a route between MP and MPP

MPP periodically sends broadcast RANN, receives MP and sends unicast PREP to MPP, and establishes a route between MP and MPP

MPP periodically sends broadcast PREQ, the received MP responds to unicast PREP, and establishes a route between MP and MPP

36. In the WLAN network, the Weak IV attack detection function does not require the support of the dynamic blacklist function.

True

False

37. The antenna is different from the signal amplifier. It is a passive device that does not require power supply, but only guides and shapes the wireless signal.

True

False

38. Regarding enabling the HSB backup group, if the AP is already online on the main AC, and then the AP information is added offline on the standby AC, the AP status on the standby AC will display fault. In this case, you need to execute the undo hsb enable command in the HSB backup group view of the standby AC to enable the HSB active/standby backup function, and then execute the hsb enable command to enable the HSB active/standby backup function, and then back up the information on the active AC again. The backup information of the active and standby is consistent, and the AP status on the standby AC will be displayed as standby at this time.

True

False

39. In a large-scale WLAN network, in order to improve the reliability of the C APWAP link between AP and AC, the DSCP priority of CAPWAP management messages can be configured as high priority.

True

False

40. Which of the following commands can be used to check whether the AP channel and transmit power are enabled with the automatic selection function?

[AC-wlan-view] display station ssid wlan-net

[AC-wlan-view] display rrm-profile name profile-name

[AC-wlan-view] display radio all

[AC-wlan-view] display yap-profile name profile-name

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41. In the WLAN network environment using the Agile Controller, regarding the 802.1x authentication failure, which of the following phenomena does not meet?

The client's 802.1x authentication fails

The client is repeatedly disconnected after passing 802.1x authentication

The device test-aaa login test is normal, and the authentication interface cannot be opened

Enter the correct account password and always prompt that the account name and password are incorrect

42. In smart roaming, sticky terminals that do not support 802.11k need to scan to obtain information of the surrounding APs to determine whether there are better neighbor APs.

True

False

43. In the packet-by-packet power adjustment feature, the basis for the AP to select the transmission power for the terminal each time before sending a data packet is mainly the current signal strength of the terminal. If the terminal signal is good, it will be sent at a lower power, otherwise it will be sent at a higher power.

True

False

44. When a large enterprise deploys a WLAN Layer 3 network, it needs to configure the Option 43 field on the Windows 2003 DHCP Server to notify the AP of the AC's IP address.

The AC's IP address is 10.23.100.1. Which of the following needs to be configured in the Option 43 field on the JDHCP Server?

030831302E32332E3130302E31

040831302E32332E3130302E31

030B31302E32332E3130302E31

030B31302E32332E31302E3031

45. If the time is set in the authorization element of the Agile Controller, what is the purpose of configuring the time during authentication and authorization rules?

Specify the total duration of user access

Specify the time point of user access

Specify the deadline for users to be offline

Specify the time range for user access

46. Which of the following commands can be used to create an RF tuning template?

[AC-wlan-view] rrm-profile name wlan-net

[AC-wlan-view] regulatory-domain-profile name domain1

[AC-wlan-view] wired-port-profile name wired-port

[AC-wlan-view] ap-system-profile name mesh-sys

47. Configure the country code

4 → 1 → 3 → 7 → 2 → 6 → 5

7 → 1 → 3 → 4 → 2 → 6 → 5

7 → 4 → 3 → 1 → 2 → 6 → 5

4 → 3 → 1 → 7 → 2 → 6 → 5

48. Three-layer roaming means that when the user roams from the original AP to the new AP, the service VLAN corresponding to the VAP changes, and the user's data message is switched to the VLAN of the new AP after roaming.

True

False

49. In smart roaming, terminals that support 802.11k can actively collect neighbor AP information and report it to the associated AP.

True

False

50. Configure the Option 43 field on the Windows 2003 DHCP Server. For example, the string 030C3139322E3136382E32322E31 represents 192.168.22.1. The fixed value of 03, 0C changed to decimal is 12, which means the string length of the IP address, the address 192.168.22.1 has a total of 12 characters, 31 means the ASCII value corresponds to 1, 9 corresponds to 9, and so on, 2E means dot.

So what should be the string corresponding to the IP address 32.15.2.14?

030733322E31352E322E3134

030A33322E31352E322E3134

030A3033322E3031352E3030322E303134

030A32332E35312E322E3431

Page 6 of 9

51. In WLAN smart roaming, what is the mechanism time for blind user protection?

20 minutes

30 minutes

60 minutes

15 minutes

52. Filter out APs that meet the threshold difference condition

1 → 2 → 3 → 4 → 5

1 → 3 → 4 → 5 → 2

1 → 5 → 3 → 2 → 4

1 → 4 → 5 → 3 → 2

53. Although the Fresnel zone exists in all radio frequency communication scenarios, its impact is mainly considered in which of the following communications?

Outdoor point-to-point scene

Indoor Mesh scene

Indoor cellular coverage

Outdoor cellular coverage

54. The typical networking of Huawei outdoor AP6510DN, AP6610DN, AP8030DN, AP8130DN all support access point mode and bridge mode.

True

False

55. Which of the following does not belong to the purpose of WLAN equipment upgrade?

Fix existing problems

Optimize the performance of the equipment

Get new features and functions

Extend the service life of the equipment

56. In large WLAN networks, customers usually deploy directory servers. What is the main function of the directory server?

Provide users with database resource index

Provide users with mail management services

Provide server cluster management services for large networks

Provide user information for the authentication server

57. AC6005 enables the flood attack detection function. By default, what is the flood attack detection cycle and the maximum number of similar packets?

30s, 100

45s, 150

60s, 300

90s, 400

58. In the WLAN network, the AP group is named ap-group1, and the WIDS template is named widsl. Now you need to enable the WIDS device detection function globally. Which of the following configurations is correct?

[AC-wlan-view] ap-group name ap-group1 [AC-wlan-ap-group-ap-group1] radio 0 [AC-wlan-group-radio-ap-group1/0] work-mode monitor [AC-wlan-group-radio-ap-group1/0] wids device detect enable

[AC-wlan-view] ap-id 0 [AC-wlan-ap-0] radio 0 [AC-wlan-radio-0/0] work-mode monitor [AC-wlan-radio-0/0] wids device detect enable

[AC-wlan-view] wids-profile name wids1 [AC-wlan-wids-prof-wids1] device detect enable

[AC-wlan-view] wids-profile name wids1 [AC-wlan-wids-prof-wids1] wids device detect enable

59. Which of the following behaviors is a threat to WLAN network security?

Weak IV attack

WDS

WIDS

WIPS

60. The following is the URL template configuration when configuring the AC6005 to connect to the Portal server. Which of the following statement is error?

The port number 8080 can be changed to 8443

Portal can be changed to webauth

url-parameter ssid ssid means SSID=ssid

url-parameter ssid ssid means any ssid

Page 7 of 9

61. Regarding the definition of WIPS/WIDS, which of the following statements is correct?

WIDS is a wireless intrusion prevention system

WIPS is a wireless intrusion detection system

WIDS is a wireless intrusion countermeasure system

WIPS is a wireless intrusion prevention system

62. Which of the following descriptions of Mesh wired port parameters are correct?

Enabling the user isolation function is mainly convenient for centralized billing, but it does not help improve user communication security

Wired ports of Mesh APs can pass all VLANs by default

Mesh only supports adding AP wired ports to VLANs in untagged form

Mesh supports adding AP wired ports to ^WLAN in the form of Untagged and Tagged

63. Regarding the dual-link hot standby configuration, when configuring the priority of an AC, the larger the priority value, the higher the actual priority of the AC.

True

False

64. Regarding the precautions for configuring the dual-system hot backup function, which of the following statements is wrong?

When configuring dual-link hot backup, you need to use the commit command on the AC to deliver the configuration to the AP after completing the service configuration on both the active and standby ACs.

When configuring dual-link hot backup, after the main AC completes the service configuration, execute the commit command to deliver the configuration to the AP, and then complete the configuration of the standby AC

When configuring dual-link hot backup, for the same AP associated with the active and standby ACs, the WLAN-related service configuration must be consistent. Otherwise, the normal operation of the AP cannot be guaranteed after the AC's active and standby status is switched.

During dual-link hot backup active/standby switching, due to the long switching time, the business data forwarded by the tunnel will be interrupted during this period, and new user will not be able to go online, and online users will not be able to roam.

65. When the engineer adjusted the directional antenna, it was found that when the antenna was placed far from the other antenna, the signal would drop, and then the signal would increase slightly. What caused this increase in signal?

Signal reflection

Frequency harmonics

Sideband

Sidelobes

66. Regarding the maintenance of the link status of the active and standby channels, to prevent the TCP from being interrupted for a long time but the protocol stack does not detect the connection interruption, which can be prevented by sending the active and standby service messages and retransmission mechanisms.

True

False

67. Which of the following descriptions of the Fresnel zone is correct?

The narrower the beam width, the larger the Fresnel area

The narrower the beam width, the smaller the Fresnel area

The Fresnel zone has nothing to do with the beam width

Other options are incorrect

68. When a user is online, it is convenient to find which AC the user is currently online, so as to obtain user data. In order to quickly know which AC a user is currently online, each AC needs to save the online status of all ACs in the roaming group and all users.

True

False

69. Assign VLAN to the terminal according to the VLAN algorithm

3 → 2 → 4 → 1

4 → 2 → 3 → 1

4 → 3 → 2 → 1

3 → 4 → 2 → 1

70. In the same frequency Mesh network, the transmission bandwidth of two APs is about 200M. What is the average transmission bandwidth when adding one AP?

Up to 200M

Up to 150M

Up to 100M

Up to 50M

Page 8 of 9

71. The Agile Controller synchronization methods include manual synchronization and automatic synchronization. Which of the following statements about synchronization methods are correct?

Agile Controller can only use one synchronization method to avoid mutual interference

The first time the Agile Controller is synchronized, manual synchronization must be used, and then automatic synchronization can be used.

The synchronization time point for the automatic synchronization of the Agile Controller can be modified

Agile Controller manual synchronization can only be used three times a day to prevent artificial increase in network load

72. When installing a long-distance point-to-point radio frequency communication link, if the distance between the transmitting and receiving antennas exceeds how many kilometers, the influence of the curvature of the earth needs to be considered?

3.3km

5.3km

7.3km

11.3km

73. In a WLAN network, when the AP is in monitoring mode, what kind of message does the AP use to determine the device type?

DHCP

ARP

CAPWAP

802.11MAC

74. In dual-system hot backup, which of the following statements about HSB backup channels is wrong?

The HSB backup channel between the main and standby ACs is recommended to be connected separately to ensure its high reliability

The HSB backup combination backup service is independent of each other, and the HSB backup group can work normally without binding.

Under VRRP hot standby, the active/standby status of the HSB backup channel follows the changes in the active/standby status of VRRP

Under dual-link hot backup, HSB channels have no active/standby status, only data backup channels

75. Regarding the MAP in the Mesh network, what is wrong in the following description?

MAP is a special form of MP

MAP is a special form of MPP

MAP is usually used to connect to the terminal

Any Mesh Point that supports AP function can provide access function for STA

76. When the user uses the WPA2-802.1x security policy and the STA supports fast roaming technology, the user does not need to re-complete the 802.1x authentication process during the roaming process, but only needs to complete the key negotiation process.

True

False

77. The following is the configuration when configuring the AC6005 to connect to the Portal server. What port does port 50200 refer to?

Web-auth-server huawei

Server-ip 10.254.1.100

Port 50200

Shared-key ciper huawei url-template huawei

The destination port number used when actively sending messages to the Portal server

Port number for processing Portal protocol packets on the device

The source port number used when actively sending messages to the Portal server

Port number for receiving Portal protocol packets on the device

78. Which of the following statement about neighbor active detection is wrong?

The AP periodically sends Probe Request frames with specified multicast addresses on different channels, and the surrounding APs perceive that the AP is a neighbor AP after receiving it.

Active detection is mainly used to establish neighbor relationships between legitimate APs

Active detection is mainly used to obtain the maximum interference signal strength between legal neighbors, the most important of which is the signal strength of neighbor APs

Both active detection and passive detection are used to collect interference from illegal Aps

79. When the WLAN network supports inter-AC roaming, multiple ACs will establish a full connection through the inter-AC tunnel. To ensure that users roaming to other ACs at Layer 3 can still receive broadcast messages in the original subnet, and simply broadcast the broadcast messages to other ACs through the roaming tunnel, a broadcast loop may be formed.

True

False

80. Which of the following commands is not necessary to configure the Mesh whitelist?

radio radio-id

ap-system-profile

mesh-whitelist-profile

peer-ap mac

Page 9 of 9

81. What does the OU in the directory server stand for?

User

User Group

Organizational unit

Domain

82. Regarding the default configuration of common parameters of dual-link cold backup, which of the following statements is correct?

AC global priority is 0

AC personality priority is 0

The dual-link backup and switchback function is not enabled

Dual link backup function is enabled

83. The "5W" in "5W1H" in the Agile Controller function introduction refers to:

Who has access to the network?

Where to access the network from?

When is the access time?

Why connect?

What equipment is connected?

True

False

84. In the Agile Controller admission control scenario, the description of the role of the RADIUS server/client, which is correct?

Agile Controller integrates all functions of RADIUS server and client

The Agile Controller acts as a RADIUS server, and the user terminal acts as a RADIUS client

The authentication device (such as an 802.1x switch) acts as a RADIUS server, and the user terminal acts as a RADIUS client

The Agile Controller acts as a RADIUS server, and the authentication device is a RADIUS client

85. The illegal device prevention function refers to the configuration of the blacklist function based on illegal devices to restrict AP or Client access.

True

False

86. Which of the following servers is a directory server?

Radius server

AD server

DNS server

Portal server

New Updated H12-321 Exam Training Material

New Updated H12-321 Exam Training Material

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