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Huawei H12-891 Online Practice Questions and Exam Preparation

H12-891 Exam Details

  • Exam Code
    :H12-891
  • Exam Name
    :HCIE-Datacom V1.0
  • Certification
    :Huawei Certifications
  • Vendor
    :Huawei
  • Total Questions
    :923 Q&As
  • Last Updated
    :May 27, 2026

Huawei H12-891 Online Questions & Answers

  • Question 391:

    Congestion avoidance technology can prevent congestion on an interface.

    A. TRUE
    B. FALSE

  • Question 392:

    Which of the following statements are correct about the command: (Choose four)

    ping -aX -cY -sZ -vpn-instance M 10.5.16.2

    A. The source IP address of the ping packets is X.
    B. The ping packets belong to VPN instance M.
    C. During the ping operation, the quantity of ICMP Request packets is Y.
    D. The size of each ICMP Request packet for the ping operation is Z bytes.

  • Question 393:

    To configure smart policy routing on a router to specify that specific traffic is forwarded through an interface, what are the two most typical types of information used to forward traffic along a particular path?

    A. The TTL and source IP address of the packet
    B. Source IP address and the Layer 2 source address
    C. Source IP address and specific protocol (such as FTP, HTTP, etc.)
    D. Service type header and message length

  • Question 394:

    Which of the following descriptions is correct about the process of registering the source-side Designated Router (DR) with the Rendezvous Point (RP) in a Protocol Independent Multicast - Sparse Mode (PIM-SM) network?

    A. The multicast service data is encapsulated within the register
    B. The RP sends a register-stop message once it receives the register message.
    C. Register messages are not used to build the Rendezvous Point Tree (RPT) between the source DR and RP.
    D. Register packets are not multicast packets.

  • Question 395:

    In a scenario where a VXLAN tunnel is dynamically established through BGP EVPN, run the command on the VTEP to view BGP EVPN routes. The route entries shown in the following figure are displayed. Which of the following statements about these routing entries are correct? (Choose two)

    Network (EthTagId / IP Prefix / IP PrefixLen) NextHop *>i 0:172.16.2.0:241.1.1.2 *>i 0:172.16.13.0:241.1.1.2 *>i 0:192.168.122.0:301.1.1.2

    A. These routes are Type 5 routes and carry network segment or mask information.
    B. These routes are Type 2 routes and carry host IP addresses.
    C. These routes carry the L2VNI.
    D. These routes carry the L3VNI.

  • Question 396:

    Which of the following statements about OSPFv3 is correct? (Choose three)

    A. The Option field of the Hello and DD packets extends to 24-bit.
    B. LSR packets contain the full LSA header information for requesting an update to the LSA.
    C. The LSACK message contains LSA header information to confirm receipt of the LSU message.
    D. The Hello message must contain the interface ID of the sending interface.

  • Question 397:

    An Ethernet Segment Identifier (ESI) is 10 bytes long and unique on the entire network.

    A. TRUE
    B. FALSE

  • Question 398:

    Which of the following descriptions about ISIS's routed infiltration is correct? (Choose two)

    A. ISIS routing penetration can be used in IPv6 environments.
    B. Route penetration for ISIS can be deployed on Level-1 routers.
    C. Route penetration for ISIS does not include aggregated routes.
    D. Route penetration of ISIS does not cause neighbor concussions.
    E. Route infiltration of ISIS is used to prevent routing loops.

  • Question 399:

    The correct description of the scenario shown in the following figure is: (Choose three)

    A. LSDB
    B. R1, which exists in both Level-1 and Level-2, can ping the interface address of R2 Loopback0
    C. R1 has a route to R2 Loopback0 10.0.2.2/32
    D. No neighbor relationship can be established between R1 and R2

  • Question 400:

    Which of the following statements is correct about the firewall security zones?

    A. The same interface of a firewall cannot belong to different security zones.
    B. Different security zones of the firewall may have the same priority.
    C. The built-in security zone of the firewall cannot be deleted.
    D. Different interfaces of the firewall can belong to the same security zone.

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