4A0-101

4A0-101 practice questions, page 5 of 13, with answer review and explanations.

Question 21

In an OSPF Hello packet, which of the following fields must match for all neighbor routers on the segment? Choose three answers.

  1. Area ID W B.
  2. Hello and Dead intervals PC.
  3. Stub flag
  4. Checksum values
  5. The list of neighbors

Question 22

Click the exhibit button. The OSPF adjacency between routers R3 and R1 is down. What is the problem?

  1. Area 1 of router R1 should not be configured as a stub.
  2. Router R3 has the incorrect authentication key type.
  3. Router R1 has the incorrect authentication key type.
  4. There is not enough information to tell.

Question 23

Click the exhibit button. Given the topology and the show commands, and assuming that router R2 advertises all of its loopbacks into OSPF, what is the correct router R1 configuration?

  1. Option A
  2. Option B
  3. Option C
  4. Option D

Question 24

In which of the following types of areas does an OSPF router not set the E bit in its Type 1 LSA?

  1. Not so stubby area
  2. Stub area
  3. Backbone area
  4. Normal area

Question 25

Click the exhibit button. In the topology shown, router R1 is an ASBR configured to export external routes to OSPF. Which of the following statements regarding the OSPF LSAs in the network is true?

  1. Router R1 generates a type 5 LSA that is flooded through all OSPF areas.
  2. Router R1 generates a type 7 LSA that is flooded through all OSPF areas.
  3. Router R1 generates a type 5 LSA that is flooded through area 1. Router R2 generates a type 7 LSA that is flooded through areas 0 and 2.
  4. Router R1 generates a type 7 LSA that is flooded through area 1. Router R3 generates a type 5 LSA that is flooded through areas 0 and 2.