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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 161:

    Regarding the Stub area and NSSA area of the OSPF protocol, which of the following statements is incorrect?

    A. Neither the Stub area nor the NSSA area allows injection of Type 4 LSA
    B. Type 5 LSA injection is not allowed in the Stub area, while Type 5 LSA injection is allowed in the NSSA area
    C. Type 7 LSA injection is not allowed in the Stub area, while Type 7 LSA injection is allowed in the NSSA area
    D. Both the Stub area and the NSSA area allow injection of Type 3 LSA

  • Question 162:

    What descriptions of the OSPF protocol are correct? (Choose two)

    A. AS-External-LSA describes the router's path to the ASBR.
    B. The cost value of the second type of external route is only the AS external cost value, ignoring the AS internal cost value.
    C. AS-External-LSA does not belong to any region.
    D. AS-External-LSA describes the path to the AS outside of the route, and the scope of the flood is the AS outside.

  • Question 163:

    ?? Route ? Policy ??: ip community-filter 1 permit 100:1 ip as-path-filter 2 permit ^100$ route-policy test permit node 10 if-match community-filter 1 if-match as-path-filter 2 apply as-path 200

    Which of the following decription about the above configuration is correct?

    A. The BGP route matches the above only if the BGP route carries a community attribute value of 100:1 or if the AS-PATH is 100. In the route-policy, the AS-PATH attribute of the matching route is changed to 200
    B. The BGP route matches the above only if the BGP route carries a community attribute value of 100:1 and the AS-PATH is 100. In the route-policy, the AS-PATH attribute of the matching route is changed to 200
    C. Only if the BGP route carries an AS-PATH of 100, the BGP route matches the route-policy above. The AS-PATH attribute of the matching route is changed to 200
    D. As long as the BGP route carries a community attribute value of 100:1, the BGP route matches the route-policy above. The AS-PATH attribute of the matching route is changed to 200

  • Question 164:

    The flood range in OSPFv3 is the LSA that floods throughout the entire autonomous system. Which LSA has this flooding scope?

    A. Intra-Area-Prefix-LSA
    B. AS-External-LSA
    C. Link-LSA
    D. Inter-Area-Prefix-LSA

  • Question 165:

    DRAG DROP

    Network Admission Control (NAC) needs to be deployed on the network shown in the exhibit. Drag the appropriate authentication mode to each authentication point.

    Select and Place:

  • Question 166:

    In OSPF, an ABR translates all Type 7 LSAs in a Not-So-Stubby Area (NSSA) into Type 5 LSAs.

    A. TRUE
    B. FALSE

  • Question 167:

    Regarding the Stub region in the OSPF protocol, which of the following statements is correct? (Choose four)

    A. ASBR cannot exist in the Stub zone
    B. Virtual connections cannot traverse the Stub region
    C. Injecting Type 7 LSA
    D. Backbone areas that are not allowed in Stub regions cannot be configured as Stub regions.

  • Question 168:

    If you have a Huawei switch running the STP protocol, and now connect the G0/0/17 interface and the G0/0/18 interface of the switch through a cable, then which of the following scenarios is correct?

    A. Both the G0/0/17 interface and the G0/0/18 interface enter the Forwarding state
    B. Both the G0/0/17 interface and the G0/0/18 interface enter the Discarding state
    C. The G0/0/17 interface enters the Blocking state
    D. The G0/0/18 interface will continuously change back and forth between the Listening state and the Learning state
    E. The G0/0/18 interface will enter the Discarding state

  • Question 169:

    The value of OSPF and BFD linkage is:

    A. Any change in BFD status is detected at the millisecond level, which correlates with the OSPF state and realizes the purpose of OSPF rapidly sensing link state changes
    B. Does not affect OSPF neighbor status
    C. BFD packet transmission interval can reach the 100-second level, which is slower than OSPF link-state detection
    D. OSPF Hello send interval is in seconds, which is faster than BFD link-state detection

  • Question 170:

    Which of the following statements about IPSec VPN is correct?

    A. Two routers establish an IPSec VPN in aggressive mode, so that the two devices can interact with a minimum of 4 messages to establish a tunnel.
    B. Aggressive mode can support NAT traversal, while main mode does not support NAT traversal.
    C. The two routers can establish OSPF neighbor relations and exchange intranet routes through the IPSec VPN tunnel.
    D. The two routers establish IPSec VPN in main mode, and from the 5th packet (included), the payload's data will be encrypted.

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