4A0-101

4A0-101 practice questions, page 7 of 13, with answer review and explanations.

Question 31

Which of the following OSPF area types are supported by the Alcatel- Lucent 7750 SR? Choose two answers.

  1. Not so stubby areas
  2. Level1 area WC
  3. Stub areas
  4. Partially stubby areas
  5. Level 2 areas

Question 32

If OSPF is used in a multi-area OSPF network, which of the following statements regarding route summarization is true?

  1. Manual route summarization can only be done on autonomous system border routers.
  2. Manual route summarization must be done on all the backbone routers to be effective. Manual route summarization is optional on the routers in non-backbone areas.
  3. Manual route summarization is done on the ABRs. By default, automatic summarization is done; however, it may not be optimal for all networks.
  4. Manual route summarization is done on the ABRs. By default, no route summarization is done and all routes are advertised to all areas.

Question 33

Click the exhibit button. The OSPF packets shown have been exchanged between two neighbors. What state is the OSPF adjacency in?

  1. The adjacency state is two way because both routers have received a database description packet.
  2. The adjacency is in the exchange state. The next step is to exchange link state request and link state update packets.
  3. The adjacency is in the ex start state. The routers have exchanged database description packets, but still have to negotiate the starting sequence number.
  4. The adjacency state is full. The routers are exchanging database description packets to notify each other that all link state advertisements have been received.

Question 34

Which of the following best describes the type of packets used by OSPF routers to exchange updates on a point-to-point link?

  1. IP packets sent to an IP multicast address.
  2. TCP packets sent to an IP multicast address.
  3. IP packets sent to an IP unicast address.
  4. UDP packets sent to an IP multicast address.

Question 35

Which of the following statements best describes an OSPF type 3 LSA?

  1. An OSPF type 3 LSA is an intra-area LSA, generated by the ABR only when route summarization is configured.
  2. An OSPF type 3 LSA is an inter-area LSA, generated by the ABR only when route summarization is configured.
  3. An OSPF type 3 LSA is an inter-area LSA, generated by an ASBR to describe external routes.
  4. An OSPF type 3 LSA is an inter-area LSA, generated by the ABR to describe a route to neighbors outside the area.