H12-821

H12-821 practice questions, page 9 of 14, with answer review and explanations.

Question 41

Which of the following statements regarding DR/BDR are false? (Choose all that apply.)

  1. In a broadcast network, DR and BDR must be elected. A broadcast network without a DR or BDR cannot operate normally.
  2. All DR others establish neighbor relationships with DR and BDR only.
  3. DR others listen on the multicast address 224.0.0.5.
  4. DR others listen on the network address 224.0.0.6.

Question 42

Which of the following statements regarding router ID in dynamic routing protocols is false?

  1. After a router ID changes, router ID of each protocol will change without requiring additional operations.
  2. If no router ID is manually configured and loopback interface addresses are configured, the largest loopback interface address is used as the router ID.
  3. If a router ID is manually configured using the router-id command, this router ID will be used.
  4. If no router ID and no loopback interface address are configured, the largest physical interface IP address is used as the router ID.

Question 43

Which of the following statements regarding OSPF AS-External-LSA are true? (Choose all that apply.)

  1. Net mask is set to all 0s.
  2. Advertising Router is set as the router ID of an ASBR.
  3. Link State ID and Advertising Router can uniquely identify an AS-External-LSA.
  4. Link State ID is set as an address on the destination network segment.

Question 44

Which of the following statements regarding BGP peer are false? (Choose all that apply.)

  1. BGP peers exchange link state information.
  2. A UDP connection must be established before BGP relationships are established.
  3. BGP routers support automatic neighbor discovery.
  4. BGP peers must be configured with MD5 authentication.

Question 45

Which of the following statements regarding BGP message types and characteristics is false?

  1. Hello messages are periodically sent between BGP peers to maintain their connection.
  2. Update messages are used to exchange routing information between BGP peers.
  3. Open messages are used to establish a peer relationship between two neighbors.
  4. Notification messages are used to transmit error information between BGP Speakers.