Cisco Certified Network Associate (CCNA) Practice Exam

This command will NOT show which interfaces are passive in an EIGRP for IPv6 setup:

1. show ipv6 protocols

2. show ipv6 eigrp interfaces

3. show ipv6 eigrp neighbors

4. show ip route

The correct answer is: show ipv6 eigrp interfaces

The command that would not display which interfaces are passive in an EIGRP for IPv6 setup is the command that focuses specifically on the EIGRP neighbor relationships. The command that fits this description does not directly report on the status of interfaces but instead provides details about the neighboring routers and their states. When examining EIGRP configurations, the command intended to show which interfaces are indeed passive is designed to reveal configuration details related to the routing protocol itself, including interfaces that are not participating in the protocol. In contrast, checking for neighbors only informs you about the routers that are actively participating in the EIGRP routing process. Therefore, it would not indicate which interfaces are passive since passive interfaces do not form neighbor relationships, and as a result, would not appear in the output. The remaining commands in the options provide insights into other aspects of the EIGRP configuration, such as routing protocols or routing tables, or specifically address the interfaces that are part of the EIGRP operation, thus allowing you to assess the interface states comprehensively.