Cisco Certified Network Associate (CCNA) Practice Exam

After configuring OSPF, which command checks the OSPF neighbors?

1. #show ip ospf interface

2. #show ip ospf neighbor

3. #display ospf neighbors

4. #check ospf status

The correct answer is: #show ip ospf neighbor

The command that checks the OSPF neighbors is indeed "#show ip ospf neighbor." This command provides detailed information about the OSPF neighboring routers on the interface. It shows the state of each OSPF neighbor, including the neighbor ID, priority, state of the adjacency, and timers associated with the neighbor relationship. Using this command is essential for network administrators to verify that OSPF neighbor relationships have been successfully established, which is crucial for the proper functioning of OSPF in a network. By analyzing the output, administrators can troubleshoot issues related to adjacency formation and ensure that OSPF routers can exchange routing information as expected. Other commands listed serve different purposes. For example, the command that references interfaces would show OSPF-related information specific to interfaces rather than neighbors. The one referencing "display" is not a valid syntax in Cisco IOS, and the command implying a check on status is not the standard command used to view OSPF neighbors, which makes "show ip ospf neighbor" the appropriate choice.