When running OSPF, what would cause router A not to form an adjacency with router B?
- A. The loopback addresses are on different subnets.
- B. The values of the dead timers on the routers are different.
- C. Route summarization is enabled on both routers.
- D. The process identifier on router A is different than the process identifier on router B.
Answer: Option B.
To form an adjacency (become neighbor), router A & B must have the same Hello interval, Dead interval and AREA numbers