H12-891

H12-891 practice questions, page 5 of 22, with answer review and explanations.

Question 21

A VPDN is a VPN constructed on a public network. Which of the following is a VPDN?

  1. L2TP
  2. VPLS
  3. GRE VPN
  4. IPsec

Question 22

On a medium-sized network configured with BGP, two RRs are typically deployed to improved BGP RR reliability. Typically, the cluster IDs of the two RRs are set as the same. Which of the following is the reason for that?

  1. To prevent loops.
  2. To prevent sub-optimal routes.
  3. To prevent memory insufficiency caused by receiving too many routes on RRs.
  4. To prevent memory insufficiency caused by receiving too many routes on clients.

Question 23

Which of the following BGP route attributes cannot be used to control BGP route selection?

  1. Community
  2. AS_Path
  3. MED
  4. Originator ID

Question 24

Which of the following fields is added to BGP4+ Update packets to advertise IPv6 routes?

  1. A new NLRI type: IPv6_NLRI, which carries the IPv6 NLRI prefix length and IPv6 NLRI prefix.
  2. A new path attribute: MP_REACH_NLRI
  3. A new path attribute: IPv6_REACH_NLRI
  4. A new path attribute: MP_UNREACH_NLRI

Question 25

On the network shown, an engineer uses two routers to test IPv6 services by running BGP4+ to simulate the communication between the enterprise headquarters and a branch. The engineer checks an Update message sent by R1. Which of the following statements about the message information is correct?

  1. The route described in the message may be imported using the import command.
  2. The message describes a withdrawn IPv6 route.
  3. The next-hop address of the route described in the message is 2001:db8:2345:l::l.
  4. The route address prefix (including the prefix length) described in the message is 2001:db8:2345:1::1/128.