H12-821

H12-821 practice questions, page 13 of 14, with answer review and explanations.

Question 61

Which of the following LSAs are advertised only within a single area?

  1. Network LSA
  2. Router LSA
  3. Summary LSA
  4. AS External LSA

Question 62

Which of the following statements regarding OSPF is true?

  1. OSPF does not have an acknowledgement mechanism. Therefore, OSPF relies on the upper-layer protocol, TCP, for acknowledgement.
  2. OSPF performs LSDB update every 30 minutes.
  3. OSPF uses the Bellman-Ford algorithm, and each router independently runs this algorithm.
  4. OSPF floods an LSU packet at an interval of 5s.

Question 63

Which of the following statements regarding the OSPF protocol is false?

  1. Each OSPF router uses only one Router-LSA to describe the local active connection status of an area.
  2. Routing information can be advertised only between backbone and non-backbone areas and cannot be advertised directerly between non-backbone areas.
  3. Router-LSA describes four connection types: P2P, TransNet, SubNet, and virtual link.
  4. Link State ID in a Type 3 LSA indicates the router ID of an ABR.

Question 64

This configuration is the part of RTA configuration. Which of the following statements regarding the configuration are true? (Choose all that apply.) [RTA]ospf 100 [RTA-ospf-100]silent-interface GigabitEthernet 1/0/0

  1. RTA cannot establish a neighbor relationship with the neighbor that this interface is directly connected to.
  2. GigabitEthernet 1/0/0 is prohibited from sending OSPF packets.
  3. Direct routes of GigabitEthernet 1/0/0 can still be advertised.
  4. This interface cannot send Hello packets.

Question 65

In the OSPF protocol, intra-area route calculation involves only Router LSA, Network LSA, and Summary LSA.

  1. TRUE
  2. FALSE