Huawei H12-891 Online Practice Questions and Exam Preparation

Huawei H12-891 Online Questions & Answers

• Question 321:

  SR-MPLS is enabled on all routers in the network. The figure shows the label stack that R1 encapsulates into a data packet before forwarding it.

  Based on the SR-MPLS label information, which of the following is the actual forwarding path of the data packet?

  A. R1 R2 R3 R5 R6
  B. R1 R2 R4 R6
  C. R1 R3 R2 R4 R6
  B. R1 R2 R4 R6

• Question 322:

  Which of the following statements about the TTL in the MPLS header is correct?

  A. The TTL acts like the TTL in an IP header and is used to prevent packet loops.
  B. It is used to control label distribution.
  C. It limits Label Switching Routers (LSRs).
  D. It controls upstream devices for label distribution.
  A. The TTL acts like the TTL in an IP header and is used to prevent packet loops.

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• Question 323:

  You expect to deploy multicast video applications on your private, on-premises network. To achieve this, you need to have a private multicast IP address in your network. Which range of IP addresses can be used?

  A. 239.0.0.0?39.255.255.255
  B. 241.0.0.0?41.255.255.255
  C. 224.0.0.0?24.255.255.255
  D. 240.0.0.0?54.255.255.255
  E. 226.0.0.0?26.255.255.255
  A. 239.0.0.0?39.255.255.255

• Question 324:

  Which of the following information about MPLS labels is incorrect?

  A. By default, devices support PHP, and an LSR that performs PHP assigns a label value of 3 to the penultimate hop
  B. When the label value is 0, the label must be popped and the packet must be forwarded based on IPv4
  C. The MPLS label is 4 bytes long and is encapsulated between the link layer and the network layer
  D. If the bottom-of-stack field identifies S = 0, it indicates that the label is the bottom label and is forwarded directly to IP
  D. If the bottom-of-stack field identifies S = 0, it indicates that the label is the bottom label and is forwarded directly to IP

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  Explanation

• Question 325:

  Which timer for the Spanning Tree Protocol dictates how often the root bridge sends configuration BPDUs?

  A. Forwarding delay timer
  B. STP timer
  C. HOLD timer
  D. MaxAge timer
  E. Hello timer
  E. Hello timer

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• Question 326:

  What is the following description of LDP reliability?

  A. LDP GR (Graceful Restart) takes advantage of the high difference between the LS forwarding plane and the control plane to realize that the device forwards without interruption when the protocol is restarted or the master-standby is reversed
  B. Manually configured LDP FRR policy defaults to a 32-bit backup route that triggers LDP to establish a backup LSP
  C. The LDP FRR can also generate an LSP for a label mapping from a non-optimal next hop, and create a forwarding table entry as a backup of the primary LSP
  D. LDP and IGP linkage requires IGP to suppress the release of routes to ensure that LDP and IGP paths are consistent
  B. Manually configured LDP FRR policy defaults to a 32-bit backup route that triggers LDP to establish a backup LSP

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  Explanation

• Question 327:

  Unlike STP, RSTP has only one BPDU type, its value is 2, and there is no TCN BPDU.

  A. TRUE
  B. FALSE
  A. TRUE

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  Explanation

• Question 328:

  In typical "two-city three-center" networking, into which layers is the bearer WAN divided? (Choose three)

  A. Core layer
  B. Aggregation layer
  C. Control layer
  D. Access layer
  A. Core layer
  B. Aggregation layer
  D. Access layer

• Question 329:

  DRAG DROP

  On the bearer WAN shown in the figure, Segment Routing (SR) is deployed, and the controller is used to calculate traffic paths. Drag the network technologies on the left to their corresponding application locations on the right.

  Select and Place:

  

  

• Question 330:

  Which of the following inter-AS MPLS L3VPN solutions need VPN user data packets to carry MPLS labels when being forwarded between ASs? (Choose two)

  A. Option A
  B. Option B
  C. Option C
  D. Option D
  B. Option B
  D. Option D