An OSPF neighbor adjacency is not formed between R3 in the main office and R4 in the Branchl office. What is causing the problem?
A. There is an area ID mismatch.
B. There is a Layer 2 issue; an encapsulation mismatch on serial links.
C. There is an OSPF hello and dead interval mismatch.
D. The R3 router ID is configured on R4.
Answer:A
An OSPF neighbor adjacency is not formed between R3 in the main office and R4 in the Branchl office. What is causing the problem?
A. There is an area ID mismatch. B. There is a Layer 2 issue; an encapsulation mismatch on serial links. C. There is an OSPF hello and dead interval mismatch. D. The R3 router ID is configured on R4.
Explanation: A show running-config command on R3 and R4 shows that R4 is incorrectly configured for area