what is most likely causing the different missing routes throughout the network?

The company and the company network have both been growing rapidly. Multiple adds,
moves and changes have been applied to the network. Your boss has asked you to
troubleshoot a recent OSPF synchronization problem that has arisen. There have been
synchronization problems at separate locations in the OSPF area 0. There have been
reported link failures during the rapid growth of the company network. You are required to
resolve the OSPF problem. OSPF must be able to converge when the network changes.

Refer to the information above to answer the following question.
Examine the following excerpt from the “show ip ospf” command on D1:

Based on the information shown above, what is most likely causing the different missing
routes throughout the network?

The company and the company network have both been growing rapidly. Multiple adds,
moves and changes have been applied to the network. Your boss has asked you to
troubleshoot a recent OSPF synchronization problem that has arisen. There have been
synchronization problems at separate locations in the OSPF area 0. There have been
reported link failures during the rapid growth of the company network. You are required to
resolve the OSPF problem. OSPF must be able to converge when the network changes.

Refer to the information above to answer the following question.
Examine the following excerpt from the “show ip ospf” command on D1:

Based on the information shown above, what is most likely causing the different missing
routes throughout the network?

A.
Area 16 is configured with authentication.

B.
Area 16 has been configured to use the same interfaces as Area 0.

C.
Area 0 and Area 32 have been configured with mismatched LSA numbers.

D.
Area 16 has been configured as a total stub network

E.
Area 16 has been configured as a stub network

F.
Area 0 is discontiguous.

G.
None of the above

Explanation:
From the topology, we see D1 has 2 interfaces belong to Area 0, that are interfaces Fa0/1 &
Fa0/2 but the output says there is only one interface in Area 0 (Number of interfaces in the
this area is 1). Therefore we can deduce that a link in area 0 was down and area 0 is
discontiguous.



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