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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 171:

    What information does the BGP Open message carry as follows? (Choose three)

    A. BGP Router ID
    B. Route attributes
    C. Local Autonomous System (AS) number
    D. Hold time

  • Question 172:

    How do 802.1w and 802.1D handle BPDUs?

    A. The 802.1D bridge only forwards BPDU packets received from the root bridge
    B. 802.1D bridges do not forward BPDU packets
    C. The 802.1w bridge only forwards BPDU packets received from the root bridge
    D. 802.1w bridges do not forward BPDU packets

  • Question 173:

    Consider the AS-path-filter configuration: ip as-path-filter 1 permit *(100l400) $. Which AS_PATH attribute can this AS-path filter match? (Choose three)

    A. 300 4200
    B. 1234 1400
    C. 3100
    D. 100

  • Question 174:

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

    A. Inter-Area Prefix-LSA's Link State ID contains the prefix
    B. Router-LSA and Network-LSA do not contain routing information
    C. When the Intra-Area Prefix-LSA's Referenced Link State Type = 2, the Referenced Link State ID contains the interface's DR ID
    D. Inter-Area Prefix-LSA also contains Link-Local information

  • Question 175:

    Based on the following SR-MPLS database information:

    Prefix-SID: 100

    SRGB Base: 40000

    Which MPLS label will PE2 use to forward traffic destined for 10.0.1.1?

    A. 39002
    B. 40002
    C. 38002
    D. 36002

  • Question 176:

    What methods does a Huawei frame switch support for establishing a cluster? (Choose three)

    A. Set up via a cluster card on the motherboard.
    B. Established by switching the cluster card on the network board
    C. Through the cluster daughter card on the interface board.
    D. Through the service interface on the interface board.

  • Question 177:

    In Huawei SD-WAN Solution, which of the following tunneling technologies is used to establish data channels?

    A. IPsec
    B. GRE over IPsec
    C. VXLAN
    D. MPLS

  • Question 178:

    Which of the following statement about the application of BFD is correct? (Choose four)

    A. The one-arm echo function refers to the detection of the connectivity of the forwarding link through the loopback operation of the BFD packet
    B. BFD multi-hop detection means that BFD can detect arbitrary paths between two systems that may span many hops or overlap in some parts
    C. BFD and OSPF linkage is to associate BFD and OSPF, and notify OSPF through BFD's rapid sensing of link failures, thereby speeding up OSPF's response to changes in network topology
    D. BFD single-hop detection refers to the IP connectivity detection of two direct-connected systems

  • Question 179:

    An engineer performed the import operation on an OSPF router in the company's network. Which of the following statement about the introduced routing LSA is correct? (Choose two)

    A. The Advertising Router field is set as the Router ID of the ASBR
    B. Net Mask is set to all 0
    C. Link State ID is set as the destination network segment address
    D. Using the Link State ID and Advertising Router, you can uniquely identify an LSA

  • Question 180:

    As shown in the figure, the overload bit of IS-IS is set in the configuration of router R3. Which of the following statements is correct? (Choose two)

    A. R3's direct routes will be ignored by R1 and R2 because of the overload bit setting.
    B. When the router runs out of memory, the system automatically sets the overload flag bit in the LSP packets it sends, regardless of whether the user configured the set-overload command.
    C. Routes imported by R3 through import-route will not be advertised.
    D. The LSP of R3 will not be able to propagate to R1 and R2.
    E. When R3 enters overload state, R1 and R2 will not calculate R3's LSP in the SPF tree.

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