Cisco Certified Network Professional (CCNP) Question:

What is the purpose of an OSPF virtual link?

CCNP Interview Question
CCNP Interview Question

Answer:

To connect a nonzero area to the backbone if the nonzero area becomes disconnected from the backbone. A virtual link can also be used if the backbone, or area 0, becomes discontiguous.


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How does OSPF determine an interarea shortest path?How is the OSPF cost of an interface calculated?