Huawei H12-821 Online Practice Questions and Exam Preparation

Huawei H12-821 Online Questions & Answers

• Question 211:

  Four routers run IS-IS and have established adjacencies. The area IDs and router levels are marked in the following figure. R1 and R2 are connected through a PPP link, and R3 is the DIS. Which of the following statements are true?

  

  A. If R2 sends a Level-2 LSP, R3 needs to send a PSNP for acknowledgment.
  B. R3 periodically sends CSNPs to implement Level-2 LSDB synchronization.
  C. R2 sends an LSP to R3 and R4 in unicast mode.
  D. If R1 sends an LSP, R2 needs to send a PSNP for acknowledgment.
  B. R3 periodically sends CSNPs to implement Level-2 LSDB synchronization.
  D. If R1 sends an LSP, R2 needs to send a PSNP for acknowledgment.

• Question 212:

  Which of the following statements about BFD operating modes are true?

  A. In demand mode, once a BFD session is set up, the system no longer periodically sends BFD Control packets.
  B. Asynchronous mode does not support the Echo function.
  C. In asynchronous mode, two systems periodically exchange BFD Control packets at the negotiated interval. If one system does not receive any BFD Control packets from the other within the detection time, the BFD session is declared down.
  D. Asynchronous mode is the primary BFD operating mode.
  A. In demand mode, once a BFD session is set up, the system no longer periodically sends BFD Control packets.
  C. In asynchronous mode, two systems periodically exchange BFD Control packets at the negotiated interval. If one system does not receive any BFD Control packets from the other within the detection time, the BFD session is declared down.
  D. Asynchronous mode is the primary BFD operating mode.

• Question 213:

  When deploying a VRRP network, an enterprise administrator sets the virtual IP address to 192.168.1.254 and VRID to 1. Which of the following is the virtual MAC address after the network becomes stable?

  A. 0000-5e01-0101
  B. 0000-5e01-0254
  C. 0000-5e00-0101
  D. 0000-5e00-0254
  C. 0000-5e00-0101

• Question 214:

  A router performs a lookup in its FIB table for a packet. If the tunnel ID in the matching entry is 0, the packet needs to be forwarded through a tunnel, such as an MPLS tunnel.

  A. TRUE
  B. FALSE
  B. FALSE

• Question 215:

  ACLs are a common matching tool in routing policies. An ACL can be configured on a router to match routes.

  A. TRUE
  B. FALSE
  A. TRUE

• Question 216:

  Which of the following statements regarding OSPF route summarization is false?

  A. OSPF supports two route summarization modes: ABR summarization and ASBR summarization.
  B. Any router in OSPF can summarize routes.
  C. Route summarization is the process of summarizing routes with the same prefix into one route and then advertising only the summarized route to other areas.
  D. Route summarization can reduce routing information, decrease the routing table size, and improve router performance.
  B. Any router in OSPF can summarize routes.

• Question 217:

  The BFD (Bidirectional Forwarding Detection) state machine implements a three-way handshake for BFD session setup or teardown Which of the following session states are involved in BFD session setup? .

  A. Up
  B. AdminDown
  C. Init
  D. Down
  B. AdminDown
  C. Init
  D. Down

• Question 218:

  BFD provides fast fault detection independent of media and routing protocols. To use this mechanism to detect link connectivity, devices at both ends must support this feature.

  A. TRUE
  B. FALSE
  A. TRUE

• Question 219:

  IGMP has three versions. Different versions support different features. Which of the following features is supported by all versions?

  A. Group-Specific Query message
  B. Leave message
  C. Report message
  D. Specifying a multicast source
  C. Report message

• Question 220:

  On an OSPF network, if two routers with the same router ID run in different areas and one of the routers is an ASBR, LSA flapping occurs.

  A. TRUE
  B. FALSE
  A. TRUE