- The interface s0/0/0 on router R2 is missing a link-local address.
- The process ID is misconfigured.
- The IP address on router R2 is misconfigured.
- The area ID is misconfigured.
Explanation: To form a neighbor relationship between OSPF speaking routers, the routers should reside on the same network and have the same Hello and dead intervals. Others criteria that must match are area ID and network type. In the topology displayed, the two routers are in two different areas, thus causing an area mismatch error.
More Questions: CCNA 3 (v5.0.3 + v6.0) Chapter 10 Exam Answers