Cisco Certified Network Associate (CCNA) Practice Exam

Which command displays a brief summary of IPv6 interfaces and their states?

1. #show ipv6 interface summary

2. #show ipv6 interface brief

3. #show ipv6 ospf interface summary

4. #show ipv6 protocols summary

The correct answer is: #show ipv6 interface brief

The command that displays a brief summary of IPv6 interfaces and their states is indeed the one you identified. When executed, this command provides a concise overview of the status of all IPv6 interfaces on the device. This includes useful information such as the interface's IP address, its status (up or down), and whether it is administratively up or down. This summary is particularly beneficial for network administrators who need to quickly assess the operational state of the IPv6 interfaces without sifting through more detailed information. It's an efficient way to verify that interfaces are configured correctly and to identify any potential issues promptly. In contrast, the other commands listed serve different purposes, and while they may provide relevant information about certain aspects of IPv6 or protocols running on the device, they do not focus specifically on giving a succinct overview of IPv6 interfaces in the manner of the command you highlighted.