Huawei H12-891 Online Practice Questions and Exam Preparation

Huawei H12-891 Online Questions & Answers

• Question 641:

  When Border Gateway Protocol (BGP) introduces routes from other protocols, is the next hop in the BGP routing table consistent with the next hop of the original routing protocol?

  A. True
  B. False
  B. False

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  Explanation

• Question 642:

  What does ipv6 enable topology ipv6 mean under the IS-IS protocol view?

  A. Does not have any meaning
  B. SPF calculation for IPv6 is not supported
  C. SPF calculation is performed separately for IPv4 and IPv6 topologies
  D. IPv4 and IPv6 use the same topology for SPF calculation
  C. SPF calculation is performed separately for IPv4 and IPv6 topologies

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• Question 643:

  ISIS does not send CSNP packets under the P2P network type during the neighbor establishment process.

  A. True
  B. False
  B. False

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  Explanation

• Question 644:

  Which of the following factors are used in the election of the primary switch in a stack? (Choose three)

  A. MAC address
  B. Health status
  C. Stack priority
  D. Stack ID
  A. MAC address
  B. Health status
  C. Stack priority

• Question 645:

  Regarding the LDP protocol session establishment process, which of the following descriptions is correct? (Choose three)

  A. When both parties receive a Keepalive message from the peer, the LDP session is successfully established
  B. Hello messages used for LDP neighbor discovery use TCP messages with a destination multicast address of 224.0.0.2
  C. After the TCP connection is successfully established, the active party sends an Initialization message to negotiate the relevant parameters of the LDP session
  D. The party with the larger transport address initiates the establishment of the TCP connection as the active party
  A. When both parties receive a Keepalive message from the peer, the LDP session is successfully established
  C. After the TCP connection is successfully established, the active party sends an Initialization message to negotiate the relevant parameters of the LDP session
  D. The party with the larger transport address initiates the establishment of the TCP connection as the active party

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  Explanation

• Question 646:

  The OSPFv3 protocol is a separately developed protocol that differs somewhat from OSPFv2 in that OSPFv3 is link-based rather than network-segment based. Which of the following statement is incorrect?

  A. Two OSPF routers connected to the link can establish a neighbor relationship even if their IPv6 address prefixes are different
  B. The routing information obtained by the OSPFv3 router from the neighbor uses the neighbor's Link-Local address as the next hop in the forwarded packet
  C. For two OSPF routers connected to the link, you can establish a neighbor relationship even if you do not configure a unicast IPv6 address
  D. All OSPFv3 interfaces use the Link-Local address as the destination address of the message
  D. All OSPFv3 interfaces use the Link-Local address as the destination address of the message

• Question 647:

  In SRv6, each time a packet passes through an SRv6 endpoint node, the Segments Left field is decremented by 1, and the IPv6 destination address (DA) is updated accordingly.

  A. TRUE
  B. FALSE
  A. TRUE

• Question 648:

  The HTTP protocol is based on TCP, so HTTP flood attacks can be defended against using the TCP flood attack prevention method.

  A. True
  B. False
  B. False

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  Explanation

• Question 649:

  Which of the following description about the CHAP authentication function in the PPP protocol is correct? (Choose three)

  A. The user name must be configured under the authenticated party interface for CHAP authentication
  B. If the authenticator does not have a username configured, password
  C. Using the authentication sequence ID, random number, and key, a Hash value is calculated using the MD5 algorithm
  D. Three message interactions are required for authentication, and only the user name is transmitted on the network without the password
  A. The user name must be configured under the authenticated party interface for CHAP authentication
  C. Using the authentication sequence ID, random number, and key, a Hash value is calculated using the MD5 algorithm
  D. Three message interactions are required for authentication, and only the user name is transmitted on the network without the password

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  Explanation

• Question 650:

  Collecting information before a cutover helps you determine whether services are normal before and after the cutover.

  A. TRUE
  B. FALSE
  A. TRUE