Good Dumps for HCIP-Routing & Switching-IERS H12-221_V2.5 Exam

dumps2021-11-17T08:01:49+08:00

H12-221_V2.5 exam is one of the three exams for you to earn HCIP Routing & Switching certification. There are 60 questions in real Huawei H12-221_V2.5 exam, and you have 90 minutes to complete all the questions. The exam format of H12-221_2.5 exam is single-answer, multiple-answer, true or false questions. Huawei H12-221_V2.5 exam languages are Chinese, English and Japanese. We just updated Huawei H12-221_V2.5 exam dumps questions, which are valid in the preparation. Free Updated H12-221_V2.5 exam dumps are available below.

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1. The following is a router BGP error output information, which description of this information is wrong?

Error Type shows that it is caused by a neighbor relationship error.

False occurred at 11:40:39 on March 22, 2010.

The router's neighbor address is 10.1.1.2.

The cause of the error may be due to the wrong writing of the peer and AS number.

2. Every DD message has a DD sequence number, which is used for the confirmation mechanism of the DD message. DD contains complete link status information.

True

False

3. RTA is the source DR router and RTB is the RP router. The multicast source sends multicast data to RTA, but the multicast source SOURCE registered with it through the PIM REGISTER message cannot be seen on RTB. Which are the possible reasons?

There is no unicast route from RTB to RTA

The RTA router cannot learn RP information

There is no multicast routing from RTA to RTB

The RP learned by RTA is not RTB

4. Which of the following parameters is used in the spanning tree protocol for root bridge election?

Root path cost

Bridge ID

Bridge priority

Port ID

5. The following description of routing strategy and strategy routing, which is correct? (Multiple choice)

Policy routing mainly controls the forwarding of messages, that is, the forwarding of messages can be performed without following the routing table.

The routing strategy mainly controls the import, release and reception of routing information.

The routing strategy mainly controls the forwarding of messages, that is, the forwarding of messages may not be performed according to the routing table.

Policy routing mainly controls the import, release, and reception of routing information.

6. In the RSTP protocol, when the root port fails, which of the following ports will quickly convert to the new root port and immediately enter the forwarding state?

Forwarding port

Backup port

Edge port

Alternate port

7. Regarding the OSPF multi-process description, which of the following statement is correct?

The concept of OSPF multi-process has global significance

An interface of a router can only belong to a certain OSPF process

Routing interaction between different OSPF processes is equivalent to routing interaction between different routing protocols

Multiple different OSPF processes can run on the same router, and they do not affect each other and are independent of each other

8. BGP prefers the route with the best Origin attribute value. The Origin attribute value is: EGP, IGP, (the first letter is capitalized).

9. Regarding DR, which of the following description is correct? (Multiple choice)

In the network segment DR election, neighbor relations and adjacency correctly described OR the same priority, IP address large election

The source DR is responsible for multicasting the REGISTER message to the RP

The receiver DR is responsible for sending JOIN messages to the multicast source RP

ASSERT WINNER on the shared network segment may not be the network segment DR

10. Which of the following functions does the OSPF Hello message have? (Multiple choice)

Maintain neighbor relations

Neighbor Discovery

Update LSA information

Synchronize the LSDB of the router

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11. MSTP solves many shortcomings of the single spanning tree of RSTP and STP. Regarding the MSTP, which of the following description is correct?

Each MST INSTANCE uses a separate STP algorithm to calculate a separate spanning tree

Each MST INSTANCE has an identifier, MSTID is a one-byte integer

All VLANs are mapped to MST INSTANCE 1 by default

MSTP allows one or more VLANs to be mapped to a MST instance, MSTP calculates the root switch separately for each MST INSTANCE, and sets the port status separately

12. Which of the following types of messages does the 283.bgp protocol support? (Multiple choice)

KEEPALIVE

OPEN

UPDATE

Hello

13. Which of the following description of AS-PATH is wrong?

AS-PATH refers to the list of AS experienced by BGP routing in the transmission path

AS-PATH is a very important and recognized mandatory attribute in BGP

BGP will not accept routes with this AS-NUMBER in the AS-PATN attribute

When there are two or more routes to the same destination in the router, these routes can be compared with each other through this attribute. The longer the AS-PATH, the more preferred the route.

14. Which of the following is not the reason why RSTP can improve the convergence speed?

P/A mechanism

Forward Delay is cancelled

Fast switching of the root port

Introduction of edge ports

15. Which of the following descriptions of the OSPF neighbor state machine is correct?

Attempt status only appears on the NBMA network

Attempt status only appears on NBMA and P2MP networks

Loading status must appear

Full state indicates that the LSDB has been synchronized, and there will be no LSDB information interaction afterwards

16. Which of the following about the description of OSPF features is wrong?

OSPF uses link state algorithm

Each router advertises local link state information through flooding LSA

Each OSPF device collects LSAs sent by other routers, and all LSAs are put together to form the link state database LSD

The LSDBs on all routers in OSPF area 0 are the same.

According to the directed graph, each router uses the SPF algorithm to calculate a shortest path tree with itself as the root, and this tree gives the route to each node in the autonomous system.

17. The following is a partial configuration of a router. Which configuration description is correct?

The packet whose source address is 1.1.1.4 matches the fourth ACL statement, rule 3, and the matching rule is allow

The packet whose source address is 1.1.1.2 matches the second ACL statement, rule 1, and the matching rule is allow

The packet whose source address is 1.1.1.1 matches the first ACL statement, rule 0, and the matching rule is allow

The packet whose source address is 1.1.1.3 matches the third ACL statement, rule 2, and the matching rule is deny

18. In the ospf routing protocol, the unit of the bandwidth-reference command is mbps.

True

False

19. The BGP attributes that can define a set of public destination addresses are:

Origin

Community

AS_PATH

MED

20. In order to ensure that the same data stream is forwarded on the same physical link, which of the following load sharing methods should be used in Eth-trunk?

Load sharing based on application layer information

Flow-based load sharing

Load sharing based on the inbound interface of the packet

Packet-based load sharing

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21. The access control list (ACL) can be used to match routing information or the address of a data packet. And only a certain type of message can be distinguished, and the message cannot be filtered.

TRUE

FALSE

22. Compared with STP, the RSTP protocol defines different port states, including Discarding and Learning. Which descriptions of these two port states are correct? (Multiple Choice)

Ports in these two states do not forward data frames

The port in the Discarding state does not learn the MAC address table

Ports in the Learning state do not learn the MAC address table

Ports in the Discarding state and Learning state do not learn the MAC address table

23. In ACL rules, if there is no rule that meets the conditions after searching all the rules, it is called a miss rule, and no processing is done on the message.

TRUE

FALSE

24. Which of the following is a community attribute value recognized by BGP? (Multiple choice)

NO_EXPORT

NO_ADVIERTISE

Advertise

Internet

25. Which of the following scenarios is not suitable for deploying interface policy routing?

Modify the next hop of locally originated traffic

On the core switch, drag the traffic from the internal network and external network to the AC device that is connected to the side-by-side network.

In the scenario of multiple ISP outlets in the corporate network, different network segments of the intranet access the Internet through different ISP outlets

On the core switch, the traffic of mutual access between the internal network and the external network is dragged to the side-mounted security detection device

26. IS-IS cannot run on P2MP (Point to MultiPoint) links.

TRUE

FALSE

27. On the VRP platform, which commands that can check OSPF neighbors? (Multiple choice)

display ospf peer

display ospf interface

display ospf lsdb

display ospf routing

28. The following description of the Origin attribute of BGP, which is wrong? (Multiple choice)

Inject BGP routes through the import command, the Origin attributes are all Incomplete

Inject BGP routes through the network command, the Origin attribute is IGP

Origin attribute three worthy priority order is EGP>IGP>INCOMOLETE

For routes learned through BGP, the Origin attribute is EGP

29. The following is part of the output information of the router huawei. The description of the output information, which is wrong?

<Huawei> display pim interface gigabitethernet 1/0/0 verbose

VPN Instance: public net

Interface: GigabitEthernet1/0/0,10.1.1.1

PIM version: 2

PIM mode: Sparse

PIM state: up

PIM DR: 10.1.1.2.

PIM DR Priority (configured): 1

PIM neighbor count:1

PIM hello interval: 30S

The router gigabitethernet1/0/0 interface is running PIMv2

The router gigabitethernet1 / 0/0 interfaces running PIM-SM

The router gigabitethernet1 / 0/0 interfaces running PIM state UP to

The DR on the interface is 10.1.1.1

30. The difference between PIM-SM ASM and SSM is? (Multiple choice)

SSM does not need to maintain RP, do not need to build RPT, do not need to register the multicast source, you can directly establish SPT between the source and group members.

After the DR of the group member side in SSM knows the needs of the user host, it directly sends a Join message to the source DR

After the DR of the group member side in ASM understands the needs of the user host, it directly sends a Join message to the source DR

ASM does not need to maintain RP, does not need to construct RPT, does not need to register the multicast source, can establish SPT directly between source and group member.

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31. The messages existing in the PIM-DM protocol are? (Multiple choice)

Join/Prune

Assert

Bootstrap

32. Which of the following descriptions about BGP loop protection is correct? (Multiple Choice)

For EBGP, through the AS-PATH attribute, discard any update information received from EBGP peers that contains its own AS number in the AS-PATH attribute

For IBGP, BGP routers will not announce any updates from IBGP peers to its IBGP peers

For IBGP, through the AS-PATH attribute, discard any update information received from EBGP peers that contains its own AS number in the AS-PATH attribute

For EBGP, the BGP router will not announce any updates from EBGP peers to its EBGP peers

33. When using a routing policy for route filtering, which of the following routing prefixes will be denied when matching the following IP-Prefix? (Multiple choice)

ip ip-prefix aa index 10 permit 1.1.1.1.24 greater-equal 26 less-equal 32

1.1.1.1/24

1.1.1.1/32

1.1.1.1/26

1.1.1.2/16

34. In the campus network, network reliability can be improved by using link aggregation and stacking technologies.

TRUE

FALSE

35. In the network shown in the figure, three switches are running RSTP, and the configuration is shown in the figure. According to the configuration in the figure, the root switch is judged to be:

SWA

SWB

SWC

Uncertain

36. When configuring OSPF on a router, which of the following configurations must be performed manually? (Multiple choice)

Create an OSPF area

Create OSPF process

Configure Router ID

Specify the network type of each OSPF-enabled interface

37. As shown in the figure, SWA, SWB, and SWC all run RSTP. What is the port role of GE0/0/2 on SWB and GE0/0/1 on SWC?

Root port, Designated port

Alternative port, Backup port

Backup port, Alternative port

Backup port, Root port

38. Different port roles are defined in the RSTP protocol from STP, among which the port roles that cannot be in the forwarding state are: (Multiple Choice)

Root Port

Designated Port

Backup Port

Alternate Port

39. Regarding the NSSA command description, which is wrong?

The default-route-advertise command is used to advertise the default route to the normal OSPF area.

The no-import-route parameter is used to prohibit the import of AS external routes into the NSSA area in the form of Type-7.

The no-summary parameter indicates that the fourth type of LSA is not advertised to the area.

set-n-bit parameter indicates DD provided incubated in N-bit flag, the bit belonging to the DD optional fields.

40. The first 4BIT of the IP multicast address is a fixed 1110, corresponding to the high 25BIT of the multicast MAC address. Only 23BIT of the last 28BIT of the IP multicast address is mapped to the MAC address, so the address information of 5BIT is lost. The direct result is that there are 32 IP multicast addresses mapped to the same MAC address.

True

False

Page 5 of 22

41. For routers running OSPF, all interfaces must belong to the same area.

TRUE

FALSE

42. The G0/0/1 interface configuration information of router A is shown in the figure. Which of the following descriptions are correct? (Multiple choice)

#

acl number3000rule 5 deny 17

rule 10 deny 89

rule 15 deny6

interface GigabitEthernet0/0/1

traffic-filter inbound acl 3000

#

This interface will not forward the received FTP packets.

This interface can establish OSPF neighbor relationships with other routers.

This interface will not forward ICMP packets.

This interface will not forward the received SNMP packets.

43. What kind of network types are supported by the ISIS protocol besides P2P?

P2MP

LAN (Broadcast Network)

44. If IGP route is to become BGP route, it can only use network command.

TRUE

FALSE

45. Which of the following description is wrong about the multicast concept?

Multicast group members: Multicast group members can be widely distributed anywhere in the network.

Multicast group: a collection identified by an IP multicast address.

Multicast routers: routers or layer 3 switches that support layer 3 multicast.

Multicast source: The sender of information, who needs to join the multicast group to provide the forwarding of multicast group messages.

46. When the Hold Time supported by two BGP neighbors are inconsistent, the neighbors will negotiate to adopt the lowest Hold Time interval that both ends can support.

True

False

47. Which of the following methods that cannot inject local routes into BGP include? (Multiple choice)

Via NETWORK command

Receive routes from peers

Via the SUMMARY AUTOMATIC command

Via IMPORT command

48. In the MSTP protocol, each MST INSTANCE uses the RSTP algorithm separately to calculate a separate spanning tree.

True

False

49. What is the correct definition of the router role within or between the OSPF area? (Multiple Choice)

Internal router: refers to a router with all interfaces belonging to the same area.

ABR: Refers to routers that connect one or more areas and connect to the backbone area, and these routers will act as routing gateways for inter-domain communication.

Backbone router: refers to a router with at least two interfaces belonging to the backbone area.

ASBR: It can be an internal router, backbone router, or area edge router.

50. [WSB]STP TC-PROTECTION?

DISABLE TC PROTECTION FUNCTION DISABLE

ENABLE TC PROTECTION FUNCTION ENABLE

What is wrong about this configuration description?

After the TC protection function is enabled, the number of times the MSTP process processes TC-type BPDUs within a unit time can be configured

Enable the TC protection function to avoid frequent deletion of MAC address table entries and ARP table entries caused by malicious attacks on switching equipment caused by attackers forging topology change BPDU packets, thereby achieving the purpose of protecting switching equipment

Execute the command STP TC-PROTECTION ENABLE to enable the protection function of the MSTP process for TC type BPDU messages

By default, the TC protection function of the switching device is disabled

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51. Compared with STP, the RSTP protocol defines different port roles. Which is correct description of the reserve port and backup port in RSTP? (Multiple choice)

The reserve port is to back up the root port

The backup port is for backing up the designated port

The switch to which the backup port belongs is not a designated switch in the network segment to which the port is connected.

The switch to which the reserved port belongs is the designated switch of the network segment to which the port is connected.

52. A router is running IS-IS, and its output information is as shown in the figure. Which of the following descriptions is correct?

The Cost value of the S4/0/0 interface is 20.

The S4/0/0 interface supports IPv6.

The period of sending IIH on the S4/0/0 interface is 30

The circuit-level of the S4/0/0 interface is Level-l.

53. Which of the following descriptions of OSPF messages is correct? (Multiple choice)

Negotiate the master-slave relationship in the ExStart state. After confirming the master-slave relationship, the master router sends DD packets, but the slave routers cannot actively send DD packets. Can only respond to DD packets sent by the main router

The Full state indicates that the LSDBs of the two routers have been synchronized.

In the Loading state, routers send each other DD packets containing a summary of link state information, describing the contents of the local LSD

The DD message sent in the ExStart state contains a description of the link state.

54. Which of the following description of the information output by the display ospf peer is correct?

ROUTER ID means the local router ID is 10.1.1.1

ADDRESS: 10.1.1 indicates that the local interface address is 10.1.1.1

During the DD exchange process, this paragraph is SLAVE

The designated router (DR) address is 10.1.1.1

55. BGP uses () message to withdraw routing entries.

56. How many bits are there in the VLAN ID in the VLAN frame format defined by IEEE 802.1Q?

57. Which of the following messages does the OSPF protocol use to confirm the received LSU message?

LSA

LSR

LSACK

LSU

58. The OSPF vlink-peer command is used to configure a virtual connection, which specifies the router-id of the peer.

True

False

59. Which of the following situations will cause the multicast traffic to fail to reach the user? (Multiple choice)

The router does not have dynamic routing

PIM protocol is not enabled on the router related interface

The upstream router discards the received Graft message.

The receiver router discards the received IGMP Report.

60. Regarding the description of OSPF route aggregation, which of the following is wrong?

Route aggregation refers to the aggregation of routing information of the same prefix, and only advertises one route to other areas

Through route aggregation, routing information can be reduced, thereby reducing the size of the routing table, and improving the performance of the router

OSPF has two route aggregation methods, ABR aggregation and ASBR aggregation

Any router in OSPF can perform route aggregation operations

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61. The AS border router can be an internal router IR or ABR, and must belong to the backbone area.

True

False

62. Which of the following messages are OSPF protocol messages? (Multiple choice)

Hello

LSU

LSA

LSR

63. Which of the following statements about the OSPF protocol is correct? (Multiple choice)

The OSPF default bandwidth reference value is 100Mbit/s.

A broadcast network segment or NBMA network segment with at least two routers is a transit network segment.

There are three types of endpoints in the topology formed by OSP

Router node, Stub network segment and Transit network segment.

The cost value from a Transit network segment to the router connected to this network segment is 100.

64. As shown in the figure, all interfaces of the router enable OSPF. The IP address identified in the figure is the IP address of the device's Loopback0 interface. Loopback0 of R1, R2, and R3 is advertised in area 1, and Loopback0 of R4 is advertised in area 0 and Loopback0 of R5 is advertised in area 2, which of the following IP addresses can ping each other? (Multiple choice)

10.0.3.3 and 10.0.5.5

10.0.2.2 and 10.0.5.5

10.0.2.2 and 10.0.3.3

10.0.4.4 and 10.0.2.2

65. As shown in the figure below, if you want employees of department A to not communicate with each other, employees of department B can communicate with each other, but different departments cannot communicate with each other, and all employees can access the company's server through MUX VLAN. To achieve this function, which of the following statement is correct?

VLAN 2 is set to interoperable VLAN

VLAN 100 is the slave VLAN

VLAN 3 is set as the main VLAN

VLAN 3 is set to interoperable VLAN

66. As shown in the figure, all switches have enabled the STP protocol. Assuming that the path cost value of all ports is 200, what is the root path cost value contained in the configuration BPDU message received by the G0/0/4 port of SWD?

400

600

200

67. In the OpenSent state, if an error is found in the Open message received, BGP sends a () message to the peer and transfers to the () state.

Notification, Active

Open, Idle

Open, Active

Notification, Idle

68. In the broadcast network, what mechanism does the IS-IS protocol use to ensure the reliability of neighbor relationship establishment?

State synchronization

Checksum

Aging timer

Three handshake

69. Which of the following descriptions about IGMP Proxy are correct? (Multiple choice)

The IGMP Proxy device cannot replace the IGMP querier to send query messages to downstream member hosts to maintain group membership.

IGMP Proxy is usually deployed on the device between the member hosts of the access device.

IGMP Proxy can detect link status in conjunction with NQA to realize fast switching between active and standby links.

The downstream interface of the IGMP Proxy device generates multicast forwarding entries based on the information of member hosts joining/leaving the multicast group.

70. Which of the following description of Local-Preference is correct?

Local-Preference is recognized as a mandatory attribute.

Local-Preference affects the traffic entering the AS

Local-Preference can be spread across AS

The default value of Local-Preference is 100

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71. Which of the following description of OSPF message verification is wrong?

The verification modes supported by AR2200 are divided into NULL SIMPLE MD5 and HMAC-MD5 according to the different methods specified in the encryption protocol.

AR2200 supports two authentication methods: area verification and interface verification

When regional verification methods and interface verification methods exist at the same time, regional verification is preferred

Only OSPF packets that pass authentication can be accepted, otherwise, neighbors cannot be established normally

72. Which metric types does IS-IS protocol support? (Multiple choice)

Narrow

Tos

wide

default

73. What are the benefits of OSPF area division? (Multiple choice)

It can reduce the size of LSDB and thus reduce the consumption of router memory.

LSA can also be reduced with the division of areas, reducing the consumption of router CP

A large number of LSA flooding is restricted to a single area.

Routers in an area can understand the topology details outside their area.

74. The ABR of the totally NSSA area advertises Type3 default routes and propagates to the area, and all inter-domain routes must pass through the ABR to be advertised.

TRUE

FALSE

75. The router ID must be advertised in the OSPF process view.

TRUE

FALSE

76. The following rules exist in an ACL of the router: rule deny tcp source 192.168.1.00.0.0.255 destination 172.16.10.10.0.0.0 destination-port eq 21. Which of the following descriptions is correct?

The source IP is 192.168.1.1, the destination IP is 172.16.10.1, and all TCP packets with the destination port number of 21 match this rule.

The source IP is 192.168.1.1, the destination IP is 172.16.10.2, and all TCP packets with the destination port number of 21 match this rule.

The type of ACL is basic AC

The source IP is 192.168.1.1, the destination IP is 172.16.10.3, and all TCP packets with the destination port number of 21 match this rule.

77. Each physical link can provide 1G of bandwidth, and now the minimum needs of 2G of bandwidth, then the lower threshold of the number of active interfaces in link aggregation can be:

Greater than or equal to 1

All of the above

78. Which of the following parameters does a router running OSPF use to elect a master-slave relationship?

Area ID

DR priority of the interface

Router-ID

IP address of the interface

79. By default, for routers running IS-IS in a broadcast network, how many seconds does the DIS send CSNP packets?

3.3

80. If the network composed of switches does not enable STP, there must be a Layer 2 loop.

TRUE

FALSE

Page 9 of 22

81. In a multicast network environment, if IGMP V2 host and IGMP v1 router (hereinafter referred to as version 2 host and version 1 router) are in the same LAN, how do they work together? (Multiple choice)

The version 1 router treats the IGMP V2 report as an invalid IGMP message type and ignores it.

When the version 1 router acts as an effective IGMP querier, the version 2 host must send an IGMP v1 report.

When a version 2 host detects that the IGMP querier is a version 1 router, it must always respond with an IGMP v1 report.

When the version 2 host leaves, it will still send an IGMP leave message, and the message cannot be suppressed.

82. About the warning information "OSPF/2/IFAUTFAIL (OID) [1.3.6.1.2.1.14.16.2.6]:

A packet is received on a non-virtual interface from a router whose authentication key or authentication type conflicts with the local authenctication key or authenctication type. (IfIpAddress=[ip-address], AddressLessIf=[interface-index], ProcessId= [process -id], RouterId=[router-id], PacketSrc=[source-ip-address], ConfigErrorType=[error-type], PacketType=[packet-type], InstanceName=[instance-name])"

Which of the following description is wrong?

It may be caused by incorrect interface verification and coordination

Errors that may be caused by inconsistent HELLO time intervals

The error may be caused by the subnet mask mismatch

The error may be caused by the area code mismatch

83. Which of the following description of the OSPF default route is wrong?

The OSPF default route can be issued by the area border router (ABR) Type3 default Summary LSA to guide the routers in the area to forward packets between areas

The OSPF default route can be issued by the Autonomous System Boundary Router (ASBR) with Type 5 external default ASE LSA or Type 7 external default NSSA LSA, which is used to guide routers in the autonomous system (AS) to forward packets outside the autonomous system

When the router does not have an exact matching route, it can forward packets through the default route.

Due to the hierarchical management of OSPF routes, the priority of Type5/7 default routes is higher than that of Type3 routes

84. Which routes in the following options satisfy the following ACL conditions ACL NUMBER 2001 RULE 0 PERMIT SOURCE 10.1.1.0.0.0.254.255 (Multiple choice)

10.1.1.1/32

10.1.2.1/32

10.1.3.1/32

10.1.4.1/32

85. In the OSPF protocol, which of the following statements is wrong?

The NETWORK MASK field in the HELLO message received in the broadcast network must be consistent with the network mask of the receiving port

The HELLOLNTERVAL field in the received HELLO message must be consistent with the configuration of the receiving port

The ROUTERDEADLNTERVAL field in the received HELLO message must be consistent with the configuration of the receiving port

The MTU in the received HELLO message must be the same as the configuration of the receiving port

86. The following is a section of MUX VLAN, about the configuration of the primary VLAN and secondary VLAN, which is the correct statement about this configuration? (Multiple choice)

VLAN 10 is the host VLAN

VLAN 11 is the host VLAN

VLAN12 is an isolated secondary VLAN

VLAN 11 and VLAN 12 are both slave VLANs

VLAN 10 and VLAN 11 are both MUX VLAN

87. The following description of BGP, which is wrong? (Multiple choice)

TCP provides an acknowledgement retransmission mechanism for BGP

Before TCP establishes a connection, BGP needs to exchange UPDATE packets

BGP uses NOTIFICATION and UPDATE messages to establish and maintain neighbor relationships

BGP uses TCP port 179 for communication

88. The BGP protocol uses the Peer default-mute-advertise command to advertise default routes to neighbors. At the same time, regarding the description of changes in the local BGP routing table, which of the following is correct?

An inactive default route is generated in the local BGP routing table, but not sent to the IP routing table.

Generate an active default route in the local BGP routing table and send it to the IP routing table.

No impact, no default route is generated in the local BGP routing table.

Generate a default route in the local BGP routing table, and deliver it to the IP routing table according to the route selection result.

89. In the OSPF routing domain, a broadcast network and an NBMA network containing at least two routers must designate one router as DR and the other as BDR.

True

False

90. One of the features of OSPF is that it only supports MD5 authentication.

TRUE

FALSE

Page 10 of 22

91. In the network shown in the figure, assuming that all routers enable OSPF at the same time, which router is the DR in this network?

Router B

Router C

Router A

Router D

92. Regarding the description of PIM-DM, which is wrong?

PIM-DM is called protocol independent multicast-dense mode, which belongs to the dense mode multicast routing protocol.

PIM-DM assumes that each subnet in the network has at least one receiving site that is interested in the multicast source.

PIM-DM uses the GRAFT graft mechanism to actively resume the forwarding of multicast packets.

There is no periodic diffusion and pruning phenomenon in PIM-DM

93. When two routers establish a logical BGP peer through multiple physical links, the peer connect-interface command must be used.

True

False

94. In a certain network environment, there are both switches running RSTP and switches running STP. What will happen in the network? (Multiple choice)

RSTP and STP are not interoperable and will perform independent operations

RSTP can interoperate with STP, but the advantages of RSTP such as rapid convergence will be lost at this time

If it is a Huawei switching equipment, RSTP will switch to STP mode, and after the switching equipment running STP is evacuated from the network, the switching equipment running RSTP can be migrated back to the RSTPA working mode

If it is a Huawei switching equipment, STP will switch to RSTP mode, and it can be configured that after the switching equipment running RSTP is evacuated from the network, the switching equipment running STP can be migrated back to the RSTPA working mode

95. The following is part of the output information of the router RTD. Which is wrong?

<RID>display igmp-snooping IGMP Snooping Information for VLAN 3

IGMP Snooping is Enabled

IGMP IP Version is Set to default 2

IGMP Query Interval is Set to default 60

IGMP Max Response Interral is Set to default 10

IGMP Robustress is Set o default 2

IGMP Lase Weniber Query Interval is Set to defauit 1

IGMP Router Port Aging Interval is Set to 180s or holdtime in hello

IGMP Snoping of VLAN3 is enabled

The version of IGMP messages that can be processed in VLAN 3 is the default value

The display igmp-snooping command is used to view the IGMP Sooping configuration information on the VLAN

The maximum response time of IGMP in VLAN3 is the default value, which is 60 seconds

96. Huawei switches provide the function of configuring port isolation. Which of the following about the description of port isolation is incorrect?

The port isolation mode can be configured as Layer 2 and Layer 3 isolation or Layer 2 isolation and Layer 3 intercommunication

Huawei switches support 64 isolation groups, numbered 0~63

If it is configured to be isolated from interface B on interface A, packets sent from interface A cannot reach interface B, but packets sent from interface B can reach interface A

Interface unidirectional isolation Supports four types of interface mixed isolation of E, GE, XGE and ETH-TRUNK, but does not support unidirectional isolation of the interface from itself, unidirectional isolation of the interface from the management network port, and ETH-TRUNK with its own member interface One-way isolation

97. The AS-Path attribute records all the AS numbers that a route passes through from the local to the destination address in vector order, so the neighboring AS numbers that are farthest from the local AS are ranked first, and the other AS numbers are arranged in order.

TRUE

FALSE

98. In order for the non-directly connected EBGP neighbors to establish a connection normally, which of the following configurations must be included?

peer ebgp-max-hop

peer connect-interface

peer ignore

peer as-number

99. Which of the following parameters cannot be used for advanced access control lists?

Physical interface

Time frame

Agreement number

Destination port number

100. Which of the following descriptions about the contents of the DISPLAY BGP ROUTING-TABLE command output is correct?

The route to the destination address 192.168.1.0 is injected into the BGP routing table through the Network command

The route to the destination address 192.168.1.0 is learned through AS200

The route to the destination address 192.168.1.0 is not optimal in the BGP routing table

The MED value of the route to the destination address 192.168.1.0 is 100

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101. RSTP redefines the port role, please match the RSTP port role with its role.

102. IS-IS routers with an interface priority of 0 cannot participate in the DIS election.

True

False

103. Which of the following information will be carried in the BGP Open message? (Multiple choice)

BGP version

Hold time

Routing attributes

BGP ID

Local Autonomous System (AS) number

104. Which of the following port states does not include the RSTP protocol?

Discarding

Forwarding

Learning

Blocking

105. Among the commonly used routing policy tools of BGP, which ones can be used to filter routes? (Multiple choice)

IP EXTCOMMUNITY-FILTER

ROUTE-POLICY

FILTER-POLICY

PEER-LIST

106. The description of Route-policy, which is correct? (Multiple choice)

A Route-policy is composed of multiple nodes, and a node can contain multiple if-match and apply clauses

The if-match clause is used to define the matching conditions of the node, and the apply clause is used to define the routing behavior that passes the filtering.

The filter rule relationship of if-match clauses is " and ", that is, all if-match clauses of the node must match.

The filtering relationship between Route-Policy nodes is " or ", that is, as long as the filtering of a node is passed, the Route-Policy can be passed.

107. Which of the following is a feature of OSPF stub area?

AS-external-LSA is allowed to be published in the STUB area.

The route to the outside of the AS can only be based on a default route manually generated by AB

Virtual connection cannot cross STUB AREA

Any area can become a STUB area

108. Which of the following is the number range of basic ACLs?

2000~2999

4000~4999

6000~6031

3000~3999

109. The route selection tool route-policy can filter by pre-defined conditions and set BGP attributes, so it is often used to define policies for BGP peers, and is often used during route generation. By default, all unmatched All routes are denied to pass the route-policy.

TRUE

FALSE

110. For the description of the routes imported by OSPF, you can filter the routing information advertised to neighbors by configuring filter rules. Which of the following descriptions is correct?

The filtering rule is only valid when configured on the ASBR

The configuration on the ABR in the filtering rule is valid

The configuration is valid on any router

The filtering of route redistribution does not filter LSA, only whether the route calculated by LSA is added to the local routing table for filtering

Page 12 of 22

111. When building a campus network, which of the following protocols can be used to avoid Layer 2 loops?

OSPF

NAT

RSTP

SNMP

112. The BGP AS_PATH attribute is an optional transitional attribute.

TRUE

FALSE

113. The ABR in the OSPF STUB area does not flood Type 5 LSA, Type 4 LSA, and Type 3 LSA into the STUB area. Therefore, the STUB area does not have AS external routing capabilities. The ABR in the STUB area advertises a default route to the area, guiding to send to destination outside the AS.

True

False

114. The following is part of the output information of the router RTD. What is the correct description of the output information?

The IGMP version enabled on this interface is version 1.

The IGMP status of the interface is DOW

Configure the time interval for sending IGMP query messages 60s on this interface

The maximum response time contained in the IGMP query message on the interface 0s

115. The differences between IGMP versions are: (Multiple Choice)

IGMP V1/V2 cannot elect the querier by itself, while IGMP V3 can.

For members to leave, IGMP V2/V3 can leave actively, but IGMP v1 cannot.

Neither IGMP V1/V2/V3 can support the SSM model.

IGMP V1 does not support specific group queries, IGMP V2 does.

116. In a network running STP, a variety of topology change information will be sent when the network topology changes. How many types of topology change information are defined in the RSTP network?

One

Two

Three

Four

117. There can be multiple nodes under a routing policy. Different node numbers are identified by node. Each node can have multiple if-match and apply words. Which of the following descriptions are wrong? (Multiple choice)

The relationship between different nodes is " or "

The relationship between different nodes is " and "

The relationship between the if-match clauses under each node is " and "

There is an " or " relationship between the if-match clauses under each node

118. When a router running BGP receives a route with an unreachable next hop, how to deal with it?

Send an error message to the router that issued the Update.

Refuse to join the BGP routing table, and silently discard it.

Receive the route and add it to the BGP routing table. But this route will not be preferred by BGP and will not be added to the IP routing table.

Receive the route, add it to the BGP routing table, and participate in the BGP routing rules. It may be selected as the best route and add it to the IP routing table.

119. OSPF NSSA region ASBR can be introduced in the area of external routes, but NSSA region ABR the fourth category does not flood the region and fifth class of LSA. Instead, the seventh type LSA is converted to the fifth type LSA and flooded to other areas.

TRUE

FALSE

120. In the static LACP mode, the correct description about the selection of the active link is: (Multiple Choice)

After adding a member interface to the ETh-Trunk in static LACP mode, the member interface will send the system priority, system MAC, interface priority, interface number and other information to the opposite end to negotiate the active port.

The greater the system LACP priority value, the higher the priority. Select the end with the larger system LACP priority value as the active end in the devices at both ends. If the system LACP priority is the same, select the end with the larger MAC address as the active end.

The passive end device determines the active interface according to the LACP priority of the active end interface and the interface ID (interface number).

The interfaces selected by the devices at both ends are inconsistent, and data can be forwarded normally.

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121. OSPF routing classification: Divided into 4 categories, according to the order of priority are?

Intra-area routing, inter-area routing, Type 1 external routing, Type 2 external routing

Intra-area routing, inter-area routing, type 2 external routing, type 1 external routing

Inter-area routing, intra-area routing, type 1 external routing, type 2 external routing

Inter-area routing, intra-area routing, type 2 external routing, type 1 external routing

122. In the following understanding of DR/BDR, which is wrong?

All DROTHER only establish neighbor relationships with DR and BDR

In the broadcast network, DR and BDR must be elected. Without either DR or BDR, the broadcast network cannot work normally

The multicast address monitored by DROTHER is 224.0.0.5

The network address monitored by DROTHER is 224.0.0.6

123. Through which command can view the detailed information of Type 2 LSA?

display ospf lsdb network

display ip ospf lsdb network

display ospf lsdb router

display ip ospf lsdb router

124. A greate command (aggregate ipy4-address{mask |mask-length}{as-set I attribute-policy route-policy-name1 I detail-suppressed I origin-policy route-policy-name2|suppress-policy route-rolicy -name3])

The aggregation process and results can be controlled through a variety of parameters. The error described below is: (Multiple Choice)

Configure the As-SEt parameter. The AS-Path of the aggregated route generated will contain all the AS-Paths of the detailed route. The AS-Path is ordered and can be used to avoid routing loops.

suppress-policy can generate aggregated routes, but suppresses detailed routes that comply with route-rolicy from being advertised to other neighbors. You can use the if-match clause of route-rolicy to selectively suppress some specific routes, that is, routes that match the policy will be suppressed, but other specific routes that fail the policy will still be advertised without being suppressed.

Origin-policy selects all detailed routes to generate aggregated routes.

attribute-policy is used to set the attributes of detailed routing.

125. Please associate the following BGP attribute names with the attribute classifications they belong to.

126. OSPF runs directly on top of the TCP protocol, using TCP port number 179.

True

False

127. What are the three ways to send IP packets? (Multiple choice)

Unicast

Multicast

Anycast

Broadcast

128. The routing attributes of the three routing entries are shown in the figure. Assuming that the next hops of the three routing entries are all reachable, when the three routing entries arrive at the BGP router in sequence, which routing entry will BGP prefer by default?

Route A

Route B

Route C

129. The address prefix list uses the source address, destination address, and next hop address prefix as a filter for matching conditions, and can only be used when the routing protocol receives routes.

TRUE

FALSE

130. As shown in the figure, all interfaces of the router enable OSPF, and R4 and R5 can establish OSPF virtual connections.

TRUE

FALSE

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131. What are the main types of ISIS Hello messages? (Multiple Choice)

LEVEL-1 LAN LLH

LEVEL-2 LAN LLH

LEVEL-3 LAN LLH

P2P LAN LLH

132. The description of the prefix list, which is correct? (Multiple choice)

The prefix list is used to filter IP prefixes, which can match the prefix number and prefix length at the same time.

The prefix list is used to filter IP prefixes and cannot match the prefix number and prefix length at the same time.

The prefix list cannot be used for packet filtering.

The prefix list can be used for packet filtering.

133. The following is about the ROUTER-LSA connection type (Type), which of the following description is wrong?

POINT-TO-POINT describes a point-to-point connection from this router to neighboring routers

TRANSNET describes the connection from this router to a TRANSIT network segment

STUBNET describes a connection from this router to a STUB network segment

P2MP describes the connection of a local router to multiple neighbor routers

134. In the process of BGP establishing a neighbor, when TCP cannot be successfully established, what is the status of the neighbor?

Idle

Active

OpenSent

Establish

135. In the RSTP protocol, when the network topology changes, the mechanism for responding to changes in the topology is:

Flooding the whole network

Modify the lifetime of the MAC address table

Take partial deletion of the MAC address table

Delete the entire MAC address table

136. Regarding the description of the permanent multicast address, what is wrong?

All hosts and routers in the network segment listen to 224.0.0.1.

All routers listen on 224.0.0.2

All routers running OSPF protocol listen on 224.0.0.5

All routers running RIP V2 protocol listen to 224.0.0.100

137. Using default routing between routers is a low-cost solution, but requires more system resources than a complete routing table.

True

False

138. Which of the following parameters are not necessary for configuring BGP PEER? (Multiple choice)

IP Address

description

as-number

password

139. Regarding the advantages of IGMP snooping, which is correct? (Multiple choice)

Reduce the broadcast message in the second layer network and save bandwidth.

Enhance the security of multicast information.

Provides convenience for realizing individual billing for each user host.

IGMP consumes a large amount of CPU of the Layer 2 switch and is not recommended.

140. A certain network structure and OSPF partition are shown in the figure. In the figure, except for RTA, RTB, RTC and RTD are all ABR routers.

TRUE

FALSE

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141. As shown in the figure, which of the following descriptions is correct?

R1 and R2 can establish adjacency and complete routing calculations.

R1 and R2 cannot establish an adjacency relationship because the 0SPF process ID is inconsistent.

R1 and R2 cannot establish an adjacency relationship because the network types of the interfaces are inconsistent.

R1 and R2 can establish adjacency, but cannot complete routing calculations.

142. Which of the following description of the information contained in the OPEN message in BGP is wrong?

The OPEN message contains VERSION information.

The OPEN message contains local AS number information.

The OPEN message contains a Hold time message.

The OPEN message is the BGP message header.

143. OSPF has five message types. Please match the message types and functions.

144. Rl contains the configuration shown in the figure. Which of the following description about the IS-IS process is correct?

The device type of R1 cannot be determined.

The device type of R1 is Leve1-1.

The device type of R1 is Leve1-2.

The equipment type of R1 is Leve1-1-2.

145. An ACL rule is: rule 5 permit ip source 10.0.1.0 0.0.254.255, which of the following IP addresses can be matched by the permit rule? (Multiple choice)

10.0.4.5

10.0.2.3

10.0.1.2

10.0.3.4

146. When OSPF is running in a broadcast network, DR and BDR need to be elected.

Then in which of the following states will DR and BDR elections be conducted?

Init status

Attempt status

2-way status

Exchange status

147. One of the features of OSPF is that it only supports MD5 authentication.

True

False

148. Regarding the description of OSPF external routing types, which is wrong?

OSPF is divided into the Type 1 of external routing and the Type 2 of external routing.

The cost value of OSPF type 1 external route is only the external cost value of the AS, and the internal cost value of the interconnected AS

The cost of OSPF type 2 external routes is the sum of the internal cost of the AS and the external cost of the AS

Under the same conditions, OSPF's type 1 of external route always takes precedence over the Typle 2 of external route

149. To realize the traffic filtering function, you can use traffic-filter or MQC. Compared with traffic-filter, MQC can be called in more views.

TRUE

FALSE

150. In order to improve the reliability of RP in large networks, dynamic RP is generally deployed. Please sort the dynamic RP election rules in order of priority from high to low.

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151. When using manual link aggregation mode, which of the following description regarding adding member interfaces is wrong?

Eth-Trunk interfaces cannot be nested, that is, member interfaces cannot be Eth-Trunk.

An Ethernet interface can only be added to any th-Trunk interface. If you need to add another Eth-Trunk interface, you must first exit the original Eth-Trunk interface.

If the local device uses Eth-Trunk, the peer interface directly connected to the member interface must also be bundled as an Eth-Trunk interface so that both ends can communicate normally.

Eth-Trunk has two working modes: Layer 2 working mode and Layer 3 working mode. Two working modes are automatically recognized, no need to switch manually.

152. Unicast technology and multicast technology have different advantages in solving the problem of single-point sending and multi-point receiving.

True

False

153. When routing policy is used for routing filtering, which of the following routing prefixes will be denied when matching the following IP-Prefix? (Multiple Choice)

1.1.1.1/24

1.1.1.1/32

1.1.1.1/26

1.1.1.2/16

154. The OSPF NBMA network type requires that the routers in the network must select DR and BDR, or they cannot work.

True

False

155. The config mode is the default ACL matching order on Huawei devices.

TRUE

FALSE

156. The following description of the Hello message in the PIM protocol, which is wrong?

Hello messages are sent in multicast mode, and the sending multicast address is 224.0.0.9

Only after the router receives the Hello message from the neighbor, will it accept other PIM control messages or multicast messages.

pim timer hello interval, configure the interval for sending Hello messages in the interface view. The default period of Hello message is 30 seconds.

pim hello-option holdtine interval Configure the Hello message timeout value in the interface view.

157. Which of the following attributes must exist in the BGP UPDATE message?

AS-PATH

LOCAL-PREF

PREFVAL

MED

158. On Huawei routers, which of the following values of OSPF protocol internal routing priority is by default?

159. 2.2.2 4 100 1 0 0 0 00:04:07 Active

The above is the output information of a router. The neighbor relationship between the router and neighbor 2.2.2.2 is in the Active state analysis below. It is most likely due to the following reasons?

It may be caused by TCP port 179 being disabled

It may be caused by not receiving the KEEPALVIE restriction from the other party

It may be caused by not receiving the update message from the other party

It may be caused by problems caused by OPEN negotiation

160. The following is part of the output configuration of the router Huawei. Which part of the configuration description is correct?

[huawei] bgp 100

[huawei-bgp]peer 12.12.12.2 ip-prefix P1 export

[huawei]ip-prefix P1 index 5 deny 10.0.0.0 0 greater-equal 8 less-equal 32

[huawei]ip-prefix P1 index 5 deny 172.16.0.0 12 greater-equal 16 less-equal 32

[huawei]ip-prefix P1 index 5 deny 192.168.0.0 16 greater-equal 16 less-equal 32

[huawei]ip-prefix P1 index 5 permit 0.0.0.0 0 less-equal 32

When the router advertises its BGP route to the BGP neighbor 12.12.12 2, it will allow it to advertise the route from 10.0.0.0 to 10.255.255.255.

When the router advertises its BGP route to the BGP neighbor 12.12.122, it will allow the advertisement of the route between 10.0.0.0 and 10.255.255.255.

When the router advertises its BGP route to the BGP neighbor 12.12.12 2, it will filter out the road between 172.16.0.0 and 172.31.255.255.

When the router advertises its BGP routes to the BGP neighbor 12.12.122, it will filter out all routes.

Page 17 of 22

161. AS_Set can avoid routing loops that may be caused by route aggregation.

TRUE

FALSE

162. In the OSPF routing protocol, under the same other conditions, the Type 2 of external route always takes precedence over the Type 1 of external route.

True

False

163. BGP neighbors are neighbor relationships established through TCP.

TRUE

FALSE

164. Compared with traditional STP, RSTP defines two different port roles. Which one is correct? (Multiple choice)

The backup port is mainly for backing up the root port, and the backup port is mainly for backing up the designated port

If the designated switch of the network segment to which the port is connected is the switch to which this port belongs, the port status is set to the standby port

The backup port is in the forwarding state, and the switch to which it belongs is the designated switch of the network segment to which the port is connected

The backup port is in the forwarding state, and the switch it belongs to is not the designated switch of the network segment to which the port is connected

Neither the backup port nor the backup port is in the forwarding state

165. The peer command can be used to manually specify neighbors in OSPF 's NBMA network.

True

False

166. When multiple routing tools are configured for route filtering on a BGP neighbor, which of the following descriptions is wrong? (Multiple choice)

For the peer to receive the route, the IP-Prefix and route-policy are processed first

For the peer to receive the route, the route-policy is processed with the IP-Prefix first

For peer sending routing, IP-Prefix and router-policy are processed first

For peer sending routes, route-policy and IP-Prefix are processed first

167. About OSPF 's Hello packets, which is correct description? (Multiple choice)

The Hello message contains the router ID list of the neighbor router, which means that the router has received a legal Hello message from the neighbor.

There are DR and BDR information in the Hello message

There is MTU information in the Hello message

There is no DR and BDR information in the Hello message

168. According to the degree of control over the multicast source, IP multicast is divided into three models, namely () (Multiple choice)

ATM

ASM

SSM

SFM

169. Which of the following about the description of BGP reliable routing updates is correct?

BGP works at the transport layer, and the UDP protocol number is 179

BGP does not need to be updated periodically

BGP sends complete routing table information every time a route is updated

BGP periodically sends OPEN messages to detect TCP connectivity

BGP uses multicast updates

170. The load sharing mode at both ends of the Eth-Trunk can be inconsistent.

TRUE

FALSE

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171. Which of the following message does the OSPF protocol use to describe its LSDB?

LSU

LSR

Hello

172. Regarding the description of the network command in BGP, which is wrong?

The route injected through the network must exist in the IP routing table.

The injected route needs to strictly match the mask length in the IP routing table

By default, BGP does not advertise any local network routes.

The network cannot be used in conjunction with the corresponding strategy.

173. MUX VLAN can reduce the consumption of enterprise VLAN ID.

TRUE

FALSE

174. As shown in the figure, OSPF multi-process is configured on the RT1 router. The process 100 of RT1 establishes OSPF neighbors through the backbone area and RT2, and the process 200 establishes OSPF neighbors through the backbone area and RT3.

Please select the wrong option below:

The OSPF process of router RT2 can use process ID 100 and RT1 to establish neighbors.

Because RT1-RT2 and RT1-RT3 establish neighbors through the backbone area, the OSPF process of RT2 has the LSA generated by the OSPF session of RT1.

The public network routing table of router RT1 has routes to RT2 and RT3.

The router RT3 public network routing table has OSPF routes to RT1 and RT2 routers.

175. An existing switch is connected to a designated port through a port, but the port does not forward any packets, but it can listen to network changes by receiving BPDUs. So which of the following should be the role of the port?

Alternate port

Disable port

Root port

Designate port

176. Different network types of the OSPF protocol can form an adjacency relationship in the Full state.

True

False

177. Which of the following contents can be filtered by advanced ACLs on Huawei devices? (Multiple choice)

Network traffic based on a specific source MAC address

Network traffic based on a specific source address

Network traffic based on a specific port number

Network traffic based on specific destination addresses

178. After the Router ID of the OSPF process is modified, it will take effect immediately.

TRUE

FALSE

179. Which of the following description of the virtual link is wrong?

If there are virtual links in the network, it generally indicates that the network design has problems and needs to be optimized.

The existence of virtual links increases the complexity of the network.

Virtual links may bring loops.

The time interval for sending HELLO on the virtual link is 10s.

180. Which of the following information is carried in the BGP Open message? (Multiple choice)

Local Autonomous System (AS) number

BGP ID

Hold time

Routing attributes

BGP version

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181. The LACP mode of link aggregation uses LACPDU to elect the active end. Which of the following information will not be carried in LACPDU?

Interface description

MAC address

Device priority

Interface priority

182. Which of the following parameters does the OSPF protocol use in the election of a master-slave relationship?

Sequence of initiating agreements

Process ID of the OSPF protocol

Interface IP address

Router ID

183. The Backup port in RSTP can replace the failed root port.

TRUE

FALSE

184. The configuration of RTA is given below, which of the following options is wrong? (Multiple choice)

multicast routing-enable This command is to enable the multicast function. If this command is not configured, the router will not forward multicast packets.

IGMP ENABLE command is used to enable IGMP on the interface. If you do not configure the multicast routing-enable command first, IGMP ENABLE can also be used as usual.

The IGMP version supported by this interface is version 2. If this command is not configured, the interface runs IGMPV1 by default.

The router monitors the multicast address 224.0.0.2 by default.

185. About the LSA description, which is correct?

The combination of LS type, Link State ID and LS sequence number together identify an LSA

The combination of LS sequence number, Link State ID and Advertising Router together identify an LS

The combination of LS type, Link State ID and Advertising Router together identify an LS

The combination of LS type, LS sequence number and Advertising Router together identify an LS

186. Which of the following descriptions about the link aggregation are correct? (Multiple choice)

Eth-Trunk interfaces cannot be nested.

GE interface and E interface cannot join the same Eth-Trurnk interface.

GE electrical interfaces and GE optical interfaces cannot be added to the same Eth-Trunk interface.

When two devices are connected, it is necessary to ensure that the link aggregation mode on both devices is the same.

187. Which services and functions of AR3200 can ACL be used? (Multiple choice)

Routing strategy

Flow classification

Firewall

Policy routing

188. Regarding the description of IGMP SNOOPING, which is correct? (Multiple choice)

IGMP SNOOPING solves the problem of multicast messages being broadcast at Layer 3.

IGMP SNOOPING runs at the link layer and is a multicast constraint on the Layer 2 Ethernet switch, used to manage and control multicast groups

IGMP SNOOPING establishes a MAC multicast address table by listening to the IGMP message sent by the host.

IGMP SNOOPING will not consume the CPU of the switch.

189. Among the following options, which routing prefixes meet the following IP-Prefix conditions? (Multiple Choice)

"Ip ip- prefix test index 10 permit 20.0.0.0 16 greater-equal 24 less-equal 28"

20.0.1.0/23

20.0.1.0/24

20.0.1.0/25

20.0.1.0/28

190. Which multicast protocol can generate a multicast distribution tree?

MBGP

MSDP

IGMPv2

PIMv2

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191. Which of the following strategies are not supported by the Policy-based route to specify the route of packet forwarding?

Source address

Destination address

Source MAC

Packet length

192. The peer command can be used to manually specify neighbors in the NBMA network of OSPF.

TRUE

FALSE

193. How to configure authentication in BGP configuration?

The same MD5 password must be used between a pair of BGP peers

All routers in the same AS must use the same password

All BGP peers on a router must use the same password

A pair of BGP peers must use the same plaintext password

194. Which of the following tools cannot be directly referenced by the apply clause of route-policy?

tag

IP-Prefix

origin

community

195. In the network shown in the figure, which of the following configurations can realize that host A cannot access the TTP service of host B ， host B cannot access the FTP service of Host A?

acl number 3000 rule 5 deny tcp source 100. 0.12.0 0.0.0. 255 source-port eq www destination 100.0.13.0 0.0.0.255 # acl number 3001 rule 5 dery tcp source 100. 0.13.0 0.0. 0.255 source-port eq ftp destination 100.0.12.0 0.0.0.255 # interface GigabitEthernet0/0/1 traffic-tilter inbound acl 3000 # interface GigabitEthernet0/0/2 trattic-tilter inbound acl 3001 #

acl number 3000 rule 5 deny tcp source 100.0.13.0 0.0.0.255 destination 100.0.12.0 0.0.0.255 destination-port eq ww # acl number 3001 rule 5 deny tcp source 100.0.12.0 0. 0.0.255 destination 100.0.13.0 0.0.0.255 destination-port eq ftp # interface GigabitEthernet0/0/1 traffic-filter outbound acl 3000 # interface GigabitEthernet0/0/2 traffic-filter outbound acl 3001 #

acl number 3000 rule 5 deny tcp source 100.0.12.0 0.0.0.255 source-port eq www destination 100.0.13.0 0.0.0.255 # acl number 3001 rule 5 deny tcp source 100.0.13.0. 0 .0.0.255 source-port eq ftp destination 100.0.12.0 0.0.0.255 # interface GigabitEthernet0/0/1 traffic-filter outbound acl 3000 # interface GigabitEthernet0/0/2 traffic-tilter outbound acl 3001 #

acl number 3000 rule 5 deny t cp source 100.0.13.0 0.0.0.255 destination 100.0.12.0 0.0.0.255 destination-port eq www # acl number 3001 rule 5 deny tcp source 100.0.12.0 0.0.0.255 destination 100.0.13.0 0.0.0. 255 destination-port eq ftp # interface GigabitEthernet0/0/1 traffic-filter inbound acl 3000 # interface GigabitEthernet0/0/2 traffic-filter inbound acl 3001 #

196. Why can we improve the QoS of the network by increasing the link bandwidth capacity? (Multiple choice)

The increase in link bandwidth can support higher traffic.

Increased link bandwidth means smaller delay and jitter.

The increase in link bandwidth reduces the probability of congestion, thereby reducing the number of lost packets.

The increase in link bandwidth can increase the available bandwidth of the control protocol.

197. Which of the following network types does the OSPF protocol support? (Multiple choice)

Point-to-multipoint type

Point-to-point type

NBMA type

Broadcast type

198. Display bgp routing-table view BGP routing table, in Status codes (Multiple choice)

>: indicates that the route is a valid route and the next hop is reachable

*: indicates that the route is the optimal route selected by BGP

>: indicates the route. The best route selected by BGP

*: indicates a valid route on the route, and the next hop is reachable

199. The three routers are running IS-IS and have established adjacency relations. The area numbers and router levels are marked as shown in the figure. If the link between R1 and R2 is interrupted, which of the following descriptions are correct? (Multiple choice)

R1 sets the Age of the LSP generated by R2 to 0.

R1 runs the SPR algorithm to delete R2 from the SPF trunk.

The default route in the R3 routing table will disappear.

The default route in the R3 routing table still exists.

200. Which command can be used to view OSPF neighbor status information?

display ospf peer

display ip ospf peer

display ospf neighbor

display ip ospf neighbor

Page 21 of 22

201. The access control list (acl) is the order of matching rules, which can be matched regardless of the order in which the user configures the ACL rules.

True

False

202. After completing the ACL configuration shown in the figure on the router RTA, which of the following descriptions is correct?

[RTA]ac1 2001

[RTA-ac1-basic-2001] rule 20 permit source 20.1.1.0 0.0.0.255

[RTA-acl-basic-2001] rule 10 deny source 20.1.1.0 0.0.0.255

The VRP system will not adjust the sequence number, but will first match the rule permit source 20.1.1.00.0.0.255.

The VRP system will first match the rule deny source 20.1.1.00.0.0.255 in order of number.

The VRP system will adjust the sequence number of the first rule to 5 according to the configuration sequence.

Configuration error, the sequence number of the rules must be configured from small to large.

203. In the network as shown in the figure, the administrator hopes that all hosts cannot access the Web service (port number is 80), and other services are normally accessed, so which ACL rules needs to be bound in the G0/0/1 interface configuration of "Traffic-filter outbound"?

acl number 3001 rule 5 deny udp destination-port eq www rule 10 permit ip #

acl number 3000 rule 5 deny tcp destination-port eq www rule 10 permit ip #

acl number 3002 rule 5 permit ip rule 10 deny tcp destination-port eq www #

acl number 3003 rule 5 permit ip rule 10 deny udp destination-port eq www

204. There are the following states in the BGP neighbor establishment process, so the sequence of the state machine experienced to establish a successful connection is:

3-1-5-2-4

3-5-1-2-4

1-3-5-2-4

3-1-2-5-4

205. Regarding the role of route filtering, which of the following descriptions is correct?

Suboptimal routes caused by route import cannot be avoided.

It can be used for precise route import and route advertisement control.

It can avoid routing loops caused by unused routing feedback.

Routing loops caused by inappropriate routing feedback are inevitable.

206. How does the IGMPV2 router maintain the network segment group membership? (Multiple choice)

The router maintains a timer for each group membership, refreshes the timer if the receiver host is received, and deletes the group membership if the timer expires

The router periodically sends Query messages, and the receiver host reports the Report message after receiving the Query message

The router will query a specific group

Unless the corresponding leave message is received, the router will not delete a group membership

207. The scale of a certain network is relatively large, some switches run MSTP, and the other part runs RSTP. When a switch running MSTP protocol detects that the switch adjacent to the port is running in RSTP mode, what mode does the MSTP protocol switch work in at this time?

STP mode

RSTP mode

MSTP mode

Uncertain

208. Please match the following IGMP versions with the corresponding working mechanism.

209. Which of the following about the description of the virtual link in OSPF?

Virtual connection can be used to solve the problem of logical discontinuity in the backbone area

Virtual connection can be established on any two area border routers, but the two border routers are required to have ports connected to a common non-backbone area

The virtual connection does not necessarily belong to the backbone area, and the specific area should be determined according to the actual topology

The virtual link belongs to area 0

210. Which of the following types of LSA can carry TAG information for external routes?

LSA5

LSA4

LSA3

LSA2

Page 22 of 22

211. Route filtering can filter routing information.

TRUE

FALSE

Good Dumps for HCIP-Routing & Switching-IERS H12-221_V2.5 Exam

Good Dumps for HCIP-Routing & Switching-IERS H12-221_V2.5 Exam

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