Cisco Certified Network Associate (CCNA) Practice Exam

Which command displays information about OSPF neighbors, their router IDs, priority number, IP addresses, and interface used to reach them?

1. show ip ospf interface

2. show ip ospf neighbor

3. show ip route

4. show ip protocols

The correct answer is: show ip ospf neighbor

The command that displays information about OSPF neighbors, including their router IDs, priority number, IP addresses, and the interfaces used to reach them, is "show ip ospf neighbor." This command provides a comprehensive view of OSPF neighbor relationships, which is crucial for troubleshooting and ensuring correct OSPF operation within a network. Understanding the significance of OSPF neighbors is important, as OSPF is a link-state protocol that relies on cooperation between routers to build a complete view of the network topology. By using this command, network administrators can monitor OSPF neighbor states, verify adjacency, and troubleshoot connectivity issues. The other commands listed serve different purposes: one is related to displaying OSPF interfaces, another shows the overall routing table, and the last provides insights into OSPF configuration details. Each command has its own specific application, but for the context of OSPF neighbor information, "show ip ospf neighbor" is the most relevant choice.