Cisco Certified Network Associate (CCNA) Practice Exam

What information is displayed by the command #show ip ospf adjacency?

1. OSPF interfaces and their states

2. Real-time OSPF adjacencies and their statuses

3. OSPF routing table entries

4. OSPF neighbor statistics

The correct answer is: Real-time OSPF adjacencies and their statuses

The command #show ip ospf adjacency is utilized to provide a detailed view of OSPF adjacencies, including their current status. This command displays information regarding the routers that have established adjacency with the local router, which is crucial for OSPF operations. It typically includes not just the list of adjacent routers but also their states, such as whether they are Full, 2-Way, or Down. This insight into the real-time relationship between OSPF routers allows network administrators to troubleshoot connectivity issues and understand the OSPF network topology. The other options, while related to OSPF, focus on different aspects of OSPF operations. For instance, the statement about displaying OSPF interfaces and their states is more aligned with the command #show ip ospf interface, which focuses on OSPF-enabled interfaces. The option referring to OSPF routing table entries is relevant to the command #show ip route ospf, which would provide details on routes learned via OSPF. Lastly, OSPF neighbor statistics would be gathered from other commands such as #show ip ospf neighbor, which provides metrics on the OSPF neighbors like timer values and address information. Thus, the correct choice accurately reflects the primary purpose