Cisco Certified Network Associate (CCNA) Practice Exam

Which command is used to display OSPF-enabled interfaces?

1. show ipv6 ospf interface brief

2. show ospf interfaces

3. show ipv6 ospf interface

4. show ospf interface summary

The correct answer is: show ipv6 ospf interface brief

The command used to display OSPF-enabled interfaces on a router is not the one indicated in the response. The correct command provides specific details about the OSPF interfaces and their operational status. The command "show ipv6 ospf interface brief" largely focuses on OSPF interfaces relevant to IPv6. It's designed to give a concise overview of which interfaces are enabled for OSPF and their key metrics in a brief format. However, for OSPF-related commands, it is common to focus on the version of OSPF for IPv4, especially when examining interfaces directly supporting OSPF. In a standard OSPF implementation, the command "show ip ospf interface" would typically be used, as it provides detailed information about all OSPF interfaces, including their cost, state, and other operational details. The initial question asks broadly for OSPF-enabled interfaces, and while the IPv6 command targets IPv6, the requirement spans OSPF in a general sense, which is commonly associated with IPv4. Understanding the specifics about OSPF-enabled interfaces is essential for network troubleshooting and optimization in environments utilizing dynamic routing protocols.