Huawei H12-891 Online Practice Questions and Exam Preparation

Huawei H12-891 Online Questions & Answers

• Question 781:

  Which of the following number sequences can be matched by the regular expression100.$? (Choose two)

  A. 1000
  B. 1001
  C. 10000
  D. 100
  A. 1000
  B. 1001

• Question 782:

  In the BSR/RP mechanism in a PIM-SM (Protocol Independent Multicast - Sparse Mode) domain, which of the following statements are correct? (Choose three)

  A. There can be multiple Candidate BSRs (C-BSR) in the PIM-SM domain, but only one BSR can be elected.
  B. The BSR collects Candidate RP (C-RP) information by receiving packets from C-RPs.
  C. The BSR advertises the BSR and C-RP information to all routers in the PIM-SM domain by flooding bootstrap messages.
  D. A Candidate BSR (C-BSR) can also collect C-RP information by receiving packets from C-RPs.
  A. There can be multiple Candidate BSRs (C-BSR) in the PIM-SM domain, but only one BSR can be elected.
  B. The BSR collects Candidate RP (C-RP) information by receiving packets from C-RPs.
  C. The BSR advertises the BSR and C-RP information to all routers in the PIM-SM domain by flooding bootstrap messages.

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  Explanation

• Question 783:

  Regarding the BGP loop-prevention mechanism, which of the following descriptions is correct? (Choose three)

  A. The AS_PATH attribute is used between autonomous systems to prevent loops
  B. The Cluster_List attribute is used for route-reflector internal loop prevention; if a router finds its own Cluster-ID in the Cluster_List of a received route, the route is rejected
  C. Routes learned from IBGP are not advertised to other IBGP neighbors, preventing routing loops inside an AS
  D. The AS_CONFED_SET attribute can be used to prevent loops within a confederation
  A. The AS_PATH attribute is used between autonomous systems to prevent loops
  C. Routes learned from IBGP are not advertised to other IBGP neighbors, preventing routing loops inside an AS
  D. The AS_CONFED_SET attribute can be used to prevent loops within a confederation

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• Question 784:

  OSPFv3 uses the same route advertisement method as OSPFv2: advertising is done through the network command in the OSPFv3 area view.

  A. True
  B. False
  B. False

• Question 785:

  HW users are transferring a very large number of files via TFTP. What protocol does TFTP rely on for transmission?

  A. ICMP and UDP
  B. IP, TCP
  C. UDP
  D. NFS
  E. FTP
  C. UDP

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• Question 786:

  For telemetry data push, data can be transferred between devices and collectors using the TLS protocol. TLS must be configured for data encryption if data is pushed based on gRPC.

  A. TRUE
  B. FALSE
  A. TRUE

• Question 787:

  DRAG DROP

  Drag each authentication mode on the left to the corresponding applicable scenario on the right.

  Select and Place:

  

  

• Question 788:

  Which of the following statement about the ISIS protocol LSP message is correct? (Choose four)

  A. The LSP fast diffusion feature first diffuses fewer than the specified number of LSPs to speed up the synchronization process of the LSDB.
  B. By configuring an LSP-generated smart timer, the timer automatically adjusts the delay time based on the frequency of changes in routing information.
  C. When the link status information increases, the message length of the LSP can be increased so that each LSP can carry more information.
  D. Reducing the minimum time interval for sending LSPs per port can speed up the diffusion of LSPs.
  A. The LSP fast diffusion feature first diffuses fewer than the specified number of LSPs to speed up the synchronization process of the LSDB.
  B. By configuring an LSP-generated smart timer, the timer automatically adjusts the delay time based on the frequency of changes in routing information.
  C. When the link status information increases, the message length of the LSP can be increased so that each LSP can carry more information.
  D. Reducing the minimum time interval for sending LSPs per port can speed up the diffusion of LSPs.

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  Explanation

• Question 789:

  What messages can Huawei equipment suppress traffic for? (Choose three)

  A. Multicast
  B. Known unicast
  C. Broadcast
  D. Unknown unicast
  B. Known unicast
  C. Broadcast
  D. Unknown unicast

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  Explanation

• Question 790:

  In which of the following cases does RSTP refresh the MAC address table? (Choose two)

  A. When the port state transitions from Forwarding to Discarding
  B. Only when the port state transitions from Listening to Discarding
  C. When a topology change notification is received
  D. When the status of a port changes
  E. When the port state transitions from Discarding to Forwarding
  C. When a topology change notification is received
  E. When the port state transitions from Discarding to Forwarding