Cisco Certified Network Associate (CCNA) Practice Exam

Which command displays all OSPF enabled interfaces, their areas, router ID, DR and BDR IP addresses, number of neighbors, and their hello and dead timers?

1. show ip ospf interface

2. show ip route

3. show ip ospf neighbors

4. show ip protocols

The correct answer is: show ip ospf interface

The command that displays detailed information about OSPF-enabled interfaces, including their areas, router ID, designated router (DR) and backup designated router (BDR) IP addresses, the number of OSPF neighbors, and their hello and dead interval timers, is indeed the one you identified. This command provides a comprehensive view of OSPF configuration and operational state, allowing network administrators to quickly assess which interfaces are participating in OSPF and how they are configured. By showing the router ID and the timers associated with OSPF, it helps in troubleshooting and monitoring OSPF operations within the network. The other commands serve different purposes. For example, one of them focuses on the overall routing table information, while another is specifically designed to show the OSPF neighbors and their states, and yet another deals with overall protocol characteristics. However, none of them offer the broad interface-specific insights that the chosen command provides.