H12-821

Review 334 H12-821 practice questions with answer explanations and community insights.

Question 1

To prevent inter-area routing loops, OSPF does not allow advertising routing information between two non-backbone areas and allows advertising routing information only within an area or between the backbone area and a non-backbone area. Therefore, each ABR must be connected to the backbone area.

  1. TRUE
  2. FALSE

Question 2

Which of the following statements regarding OSPF packets is false?

  1. DD packets contain all LSA information and can be used to periodically synchronize LSOB information between neighbors.
  2. Hello packets are used to discover and maintain OSPF neighbor relationships and also can be used to elect DR and BDR on broadcast and NBMA networks.
  3. Two routers must send Hello packets at the same interval. Otherwise, they cannot establish an OSPF neighbor relationship.
  4. DD packets carry LSA header information to describe link state summary information.

Question 3

Which of the following statements regarding OSPF neighbor relationship and adjacency is true?

  1. Not all neighbors can establish adjacencies.
  2. Neighbor relationships are selected from adjacencies to exchange routing information.
  3. OSPF routers must establish an adjacency before exchanging information.
  4. Adjacencies are maintained using OSPF DD packet

Question 4

Which of the following statements regarding different LSA types is false?

  1. LS Update packets contain complete LSA information.
  2. LS Ack packets contain complete LSA information.
  3. LS Request packets contain only LS Type, LS ID, and Advertising Rooter.
  4. DD packets contain only LSA summary information, including LS Type, LS ID, Advertising Router, and LS Sequence Number.

Question 5

See the network shown in the following figure. Route leaking is configured on R1. In this case, R1 sends a Level-2 LSP to R3 so that R3 can learn routes on the entire network.

  1. TRUE
  2. FALSE
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