Cisco Certified Network Associate (CCNA) Practice Exam

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To view the entire OSPF database, which command would you use?

#show ip ospf database
#show ip route
#show running-config
#debug ip ospf

The correct answer is: #show ip ospf database

The command to view the entire OSPF (Open Shortest Path First) database is indeed the one that specifically targets OSPF information: "show ip ospf database." This command allows network professionals to access detailed information about the OSPF network's state, including all the Link State Advertisements (LSAs) that have been exchanged within the OSPF domain. Using this command is crucial for troubleshooting OSPF issues, understanding the network topology, and verifying that OSPF routers have correctly populated their databases with information from neighboring routers. The output provides insights into routes, their metrics, and how OSPF sees the overall network structure. The other commands serve different purposes; for example, "show ip route" displays the routing table, which includes various routing protocols but does not contain detailed OSPF database information. "show running-config" provides the current configuration of the device, not OSPF-specific data, and "debug ip ospf" may produce detailed troubleshooting information but is not used to view the entire OSPF database effectively, and it can also impact device performance due to the high volume of output.