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  1. Home
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  3. H12-831

Huawei H12-831 Exam (page: 11)
Huawei HCIP-Datacom-Advanced Routing & Switching Technology
Updated on: 15-Feb-2026

Viewing Page 11 of 55
H12-831 PDF 520 Questions

CORRECT TEXT
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)

  1. (port-isolate enable)

Answer(s): A



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

  1. MPLSTcorrect toTTLis handled in two ways. one isIPmessage is enteringMPLSwhen the network MPLSheadTTLcopyIPTTLValue: The other is at the entranceLERWillMPLSheadTTLsystem-settings for 255
  2. Can prevent infinite loop forwarding of packets
  3. copyIPTTLThe way the value is handled is hiddenMPLSDomainLSRPlayed a role in the safety of the lake
  4. Banned from holding shellsTTLin the case of,tracertcan see passingMPLSDomainLSR

Answer(s): A,B



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?

  1. 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.
  2. 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
  3. By default, IPv4 and IPv6 networks will be calculated separately to form different shortest path trees
  4. 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.

Answer(s): B



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)

  1. Configuring black hole routing can solve the routing black hole problem
  2. Routing black hole has no impact on the network and can be ignored
  3. Precise routing $ can always avoid routing black holes
  4. 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

Answer(s): A,C,D



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?

  1. The device cannot log in remotely
  2. pass throughPINGSerious packet loss during network test with command
  3. CPUOccupancy exceeds70%
  4. use on the deviceDISPLAY INTERFA, CEcommand to view interface statistics, it is found that the interface receives a large number of broadcast message

Answer(s): A,B,C,D



Viewing Page 11 of 55



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