Huawei H12-821 Online Practice Questions and Exam Preparation

Huawei H12-821 Online Questions & Answers

• Question 161:

  Which of the following statements regarding OSPF is true?

  A. OSPF does not have an acknowledgement mechanism. Therefore, OSPF relies on the upper-layer protocol, TCP, for acknowledgement.
  B. OSPF performs LSDB update every 30 minutes.
  C. OSPF uses the Bellman-Ford algorithm, and each router independently runs this algorithm.
  D. OSPF floods a LSU packet at an interval of 5s.
  B. OSPF performs LSDB update every 30 minutes.

• Question 162:

  A switch runs MSTP. The configuration is shown in the figure. What is the role of this switch in MSTI 1?

  

  A. Uncertain
  B. Root switch
  C. Non-root switch
  D. Secondary root switch
  A. Uncertain

• Question 163:

  Compared with STP, RSTP defines the different port states. Which of the following statements regarding discarding and learning states are true?

  A. The port In discarding or learning state does not forward data frames.
  B. The port in discarding state does not learn MAC addresses table.
  C. The port in discarding or learning state does not learn MAC addresses
  D. The port In learning stole docs not learn MAC addresses table.
  A. The port In discarding or learning state does not forward data frames.
  B. The port in discarding state does not learn MAC addresses table.

• Question 164:

  When two routers exchange LSDB information using DD packets, a master/slave relationship is formed first, the router with a larger router ID is the master, and determine the MS bit.

  A. TRUE
  B. FALSE
  A. TRUE

• Question 165:

  A router uses an advanced ACL to filter data. The ACL configuration is shown below. Which of the following statements is false about the configuration?

  [Huawei] acl 3001 [Huawei-acl-adv-3001] rule permit icmp source 192.168.1.3 0 destination 192.168.2.0 0.0.0.255

  A. The ACL permits ICMP packets from host 192.168.1.3 to host 192.168.2.200.
  B. The ACL denies ICMP packets from host 192.168.1.2 to network segment 192.168.2.0/24.
  C. The ACL permits IP packets from host 192.168.1.3 to network segment 192.168.2.0/24.
  D. The ACL is a numbered ACL whose number is 3001.
  C. The ACL permits IP packets from host 192.168.1.3 to network segment 192.168.2.0/24.

• Question 166:

  After which of the following parameters are modified does an IS-IS neighbor relationship need to re- established?

  A. The cost of an IS-IS interface is changed.
  B. The IP address of an ISIS interface is changed.
  C. The level of an ISIS interface is changed.
  D. The interval at which an IS-IS interface sends IIH packets is changed.
  C. The level of an ISIS interface is changed.

• Question 167:

  DRAG DROP

  Drag the following VRRP states to the corresponding working mechanisms.

  Select and Place:

  

  

• Question 168:

  Which of the following PIM protocol packets have unicast destination addresses.

  A. Register Stop
  B. Bootstrap
  C. Graft
  D. Assert
  A. Register Stop
  C. Graft

• Question 169:

  Similar to the OSPF DR, the IS-IS DIS needs to be elected on a broadcast network. However, the OSPF DR is preemptive by default, whereas the IS-IS DIS is not preemptive by default.

  A. TRUE
  B. FALSE
  A. TRUE

• Question 170:

  CORRECT TEXT

  In BGP, Keepalive messages are used to maintain BGP peer relationships. When a BGP router receives a Keepalive message from a peer, the BGP router sets the state of the peer to Established and periodically sends Keepalive messages

  to maintain the connection. By default, the device sends Keepalive messages every seconds.

  60