Implementing Cisco IP Routing (CCNP ROUTE, legacy) — Question 95

In which state do DR and BDR establish adjacency with each OSPF router in the network?

Answer options

• A. Init State
• B. Exstart State
• C. Exchange State

Correct answer:

Explanation

The correct answer is B. In the Exstart State, the DR and BDR establish adjacency with other OSPF routers to determine the initial sequence number for the link-state database exchange. In the Init State, no adjacency is formed yet, and in the Exchange State, the routers are actually exchanging link-state information rather than establishing adjacency.