Huawei H12-891 Online Practice Questions and Exam Preparation

Huawei H12-891 Online Questions & Answers

• Question 741:

  Configuring filter-policy 2000 export in the IS-IS process, which of the following statements about the function of the command is incorrect?

  A. It needs to be used in conjunction with route ingestion and acts as an external route sender neighbor that only partially introduces routes.
  B. If you do not configure this command, the device will by default introduce the external routing protocol to the IS-IS route all outgoing.
  C. Restricts the external publication of route entries generated by the device itself.
  D. This command will filter the link status information released to the outside world.
  D. This command will filter the link status information released to the outside world.

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• Question 742:

  FILL IN THE BLANK

  Huawei Open Programmability System (OPS) uses HTTP methods to access managed objects to manage network devices. HTTP is the most widely used network transmission protocol on the Internet. By default, the TCP port number _____ is used. (Fill in Arabic numerals.)

  80

• Question 743:

  Regarding the MPLS handling mode of TTL, which of the following description is correct?

  A. Pipe mode: When an IP message passes through the MPLS network, the IP TTL minus 1 is mapped to the MPLS TTL field at the incoming node.
  B. The TTL in the MPLS label has the same meaning as the TTL field in the IP header. TTL prevents MPLS networks from developing bad routing.
  C. Uniform mode: When an IP packet passes through the MPLS network, the IP TTL of the incoming node is minus 1. The MPLS TTL field is a fixed value.
  D. In MPLS VPN, if you need to hide the structure of the MPLS backbone network, you can use Uniform mode on ingress for private network messages.
  B. The TTL in the MPLS label has the same meaning as the TTL field in the IP header. TTL prevents MPLS networks from developing bad routing.

• Question 744:

  There is an existing router running OSPF connected to Area 0 and Area 1. You configured Area 1 as a Stub area. Which classes of LSAs operate only inside Area 1?

  A. Type 7 LSA
  B. Type 1 LSA, Type 2 LSA
  C. Type 1 LSA, Type 2 LSA, Type 5 LSA
  D. Type 3 LSA, Type 4 LSA
  E. Type 1 LSA, Type 2 LSA, Type 3 LSA
  E. Type 1 LSA, Type 2 LSA, Type 3 LSA

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  Explanation

• Question 745:

  In the small and midsize campus network design based on the Huawei CloudCampus Solution, when over 100 branches need to communicate with each other, which of the following interconnection networking models is recommended?

  A. Direct networking
  B. Full-mesh networking
  C. Hub-spoke networking
  D. Partial-mesh networking
  C. Hub-spoke networking

• Question 746:

  There is an existing switch running the RSTP protocol. If the network topology changes, what happens to the Layer 2 forwarding table automatically learned by the switch?

  A. All table entries are dropped
  B. Except for the table entry related to the edge port that is not deleted, all other table entries are deleted
  C. Only table entries related to the port that received the TC message are dropped
  D. If the aging time is set to 15 seconds, entries that exceed the aging time are deleted
  E. Table entries are dropped except for table entries related to edge ports and table entries related to ports that receive TC messages
  E. Table entries are dropped except for table entries related to edge ports and table entries related to ports that receive TC messages

• Question 747:

  By default, which of the following security MAC address types lose table entries after the device restarts?

  A. Sticky MAC address
  B. Black hole MAC address
  C. Secure static MAC address
  D. Secure dynamic MAC address
  D. Secure dynamic MAC address

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  Explanation

• Question 748:

  Which of the following statements about the VPNv4 address is incorrectly described?

  A. By default, PE does not perform VPN-target filtering on received VPNv4 routes.
  B. The local PE sets up an Export Target for these routes before releasing VPNv4 routes learned from sites that are directly connected to them to other PEs. These routes are published with extended community attributes for BGP.
  C. Carries the RD attribute when BGP publishes both reachable and unreachable VPNv4 routes.
  D. The VPNv4 address has a total of 12 bytes, including an 8-byte route identifier (RD - Route Distinguisher) and a 4-byte IPv4 address prefix.
  A. By default, PE does not perform VPN-target filtering on received VPNv4 routes.

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• Question 749:

  Which of the following statements is incorrect about Authentication Header (AH)?

  A. AH provides packet encryption.
  B. AH provides data origin authentication.
  C. AH provides anti-replay protection.
  D. AH provides data integrity authentication.
  A. AH provides packet encryption.

• Question 750:

  ICMPv6 uses the Type field to identify the message type. Based on the value of the Type field, ICMPv6 messages can be divided into two categories: error messages and informational messages.

  A. True
  B. False
  A. True

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  Explanation