Cisco Certified Network Associate (CCNA) Practice Exam

Which command provides details about the OSPF router's hello and dead timers?

1. #show ip ospf interface

2. #show ip protocols

3. #show ip ospf neighbor

4. #show ip route

The correct answer is: #show ip ospf interface

The command that provides details about the OSPF router's hello and dead timers is indeed the specific command that displays the OSPF configuration for all interfaces that are participating in the OSPF process. This command provides not only the timer values but also other pertinent information such as the interface state, network type, and cost. Using the command that shows OSPF interface details allows network administrators to see the exact configuration of OSPF on each interface, including the hello and dead intervals defined for OSPF neighbors on that interface. This is critical for troubleshooting and ensuring optimal OSPF behavior, as incorrect timer values can lead to issues like neighbors not forming adjacency or unnecessarily frequent OSPF database exchanges. In contrast, while the commands for showing protocols and neighbor relationships provide valuable OSPF information, they do not specifically detail the timer settings. The command that displays routing information offers a broader view of the network but does not delve into the specifics of OSPF timers.