Huawei Huawei Certifications H12-831 Questions & Answers

• Question 211:

  An engineer uses two routers to test IPv6 services, and runs 0SPFv3 to implement IPv6 network interconnection. R1 is required to be able to access the loopback interface address of R2. The engineer checked the OSPFv3 routing table entry of R1, as shown in the figure, and found that there was no route to the loopback interface address of R2. Which of the following reasons could not be the cause?

  

  

  A. R2 advertises the loopback interface into different OSPFv3 processes

  B. R2 does not have 0SPFv3 enabled on the loopback interface

  C. R2 does not use network to advertise loopback address in area 0

  D. R2 is not configured with the Router ID used in the OSPFv3 process

  Correct Answer: B

• Question 212:

  According to this picture, you can judge

  

  A. The optimal outgoing interface for R1 to access room 3000: FDEA::3 is GigabitEtherneto/0/1

  B. R1 with 3000:FDEA::3 is IB6P neighbor

  C. R1 has a TCP connection with 3000:FDEA::3

  D. R1 learned route 3002 through IBGP::3/128

  Correct Answer: BD

• Question 213:

  Ethernet is a network that supports broadcasting, and once there is a loop in the network, this simple broadcasting mechanism can cause catastrophic consequences. Which of the following phenomena may be caused by loops?

  A. The device cannot log in remotely

  B. pass throughPINGSerious packet loss during network test with command

  C. CPUOccupancy exceeds70%

  D. use on the deviceDISPLAY INTERFA, CEcommand to view interface statistics, it is found that the interface receives a large number of broadcast message

  Correct Answer: ABCD

• Question 214:

  As shown in the figure, configure a backhaul summary route 10.0.0.0/24 on the border route RT1. next hop to RT2. At the same time, the default route to the external network is configured. At this point, a routing black hole will appear. The following is about routing.

  Is the black hole statement correct? (multiple choice)

  

  A. Configuring black hole routing can solve the routing black hole problem

  B. Routing black hole has no impact on the network and can be ignored

  C. Precise routing $ can always avoid routing black holes

  D. If the terminal in the network sends data packets to the network segment that does not appear on the internal network, a loop will occur

  Correct Answer: ACD

• Question 215:

  Which of the following statements about MPLS header TTL is correct?

  A. MPLSTcorrect toTTLis handled in two ways. one isIPmessage is enteringMPLSwhen the network MPLSheadTTLcopyIPTTLValue: The other is at the entranceLERWillMPLSheadTTLsystem-settings for 255

  B. Can prevent infinite loop forwarding of packets

  C. copyIPTTLThe way the value is handled is hiddenMPLSDomainLSRPlayed a role in the safety of the lake

  D. Banned from holding shellsTTLin the case of,tracertcan see passingMPLSDomainLSR

  Correct Answer: AB

• Question 216:

  IS-IS is a link-state routing protocol that uses the SPF algorithm for route calculation. As shown in the figure, a campus deploys both IPv4 and IPv6 and runs IS-IS to achieve network interconnection. R2 only supports IPv4. Which of the following statements is true about the topology calculation of this network?

  

  A. If you want IPv4 and IPv6 network computation to form the same shortest path tree, you need to run the ipv6 enable topology ipv6 command to enable the IPv6 capability in the IS- IS process.

  B. By default, since R2 does not support IPv6, in the shortest path tree formed by IPv6 network calculation, the path from R1 to R4 is: R1-R3-R4

  C. By default, IPv4 and IPv6 networks will be calculated separately to form different shortest path trees

  D. By default, in the shortest path tree formed by IPv6 network calculation, the path from R1 to R4 is: R1-R2-R4. Since R2 does not support IPv6, R2 will directly discard IPv6 packets after receiving them, causing traffic loss.

  Correct Answer: B

• Question 217:

  By executing___________The command can completely isolate the second and third layer users of different ports on the same LAN and cannot communicate. (Please use English and lowercase letters to complete the command, and the command cannot be abbreviated)

  A. port-isolate enable

  Correct Answer: A

• Question 218:

  BGP4+ carries the next hop address of the IPv6 route through the Next Hop attribute in the Update packet.

  A. True

  B. False

  Correct Answer: B

• Question 219:

  Which of the following commands can be used to view information about BGP VPNv4 routes and BGP private network routes on PEs interest?

  A. display bgp routing-table address-family vpnv4

  B. display bgp vpnv4 routing-table

  C. display bgp routing-table ipv4-family vpnv4

  D. display vpnv4 bgp routing-table

  Correct Answer: B

• Question 220:

  In the topology shown in the figure, the entire network runsOSPFv3agreement inNoIn the case of attracting external routes,R1which type ofLAS?

  

  A. Intra-Area-Prefix-LSA

  B. Link-LSA

  C. Inter-Area-Router LSA

  D. Inter-Area-Prefix-LSA

  Correct Answer: C