What command can you use to view OSPF interface configurations?

The command to view OSPF interface configurations is "show ip ospf interface." This command provides detailed information about the OSPF-enabled interfaces on a router, including the OSPF state, costs, neighbors, and other configuration details that are relevant to routing decisions made by OSPF.

When this command is executed, the output includes information such as the OSPF area associated with the interface, the IP address of the interface, and various OSPF parameters like the hello and dead intervals, which influence the OSPF neighbor relationships. This information is crucial for troubleshooting OSPF issues and ensuring that OSPF is operating as intended on a specific interface.

In contrast, the other options do not correspond to valid commands in Cisco IOS for viewing OSPF interface configurations. They either use incorrect syntax or do not follow the command structure used in Cisco devices, making them ineffective for this purpose.