Cisco Certified Network Associate (CCNA) Practice Exam

Which command would you use to check if EIGRP or OSPF interfaces are passive?

1. show ipv6 protocols

2. show ipv6 eigrp interfaces

3. show ipv6 eigrp neighbors

4. show ipv6 eigrp topology

The correct answer is: show ipv6 protocols

To determine whether EIGRP or OSPF interfaces are set to passive, the appropriate command provides insights into the operational protocols and their configurations. The command that reveals the status of the interfaces for these routing protocols, including whether they are passive or active, is the one that presents an overview of all configured protocols and their settings. The correct command shows general information about IPv6 routing protocols, which includes both EIGRP and OSPF. Among the details provided, it indicates whether specific interfaces are listed as passive. Passive interfaces do not participate in routing advertisement but can still receive updates, making the understanding of their state crucial when managing network traffic and routing behaviors. The other commands focus on specific aspects of EIGRP. For example, one of those options provides details about EIGRP interfaces, but does not necessarily summarize the passive or active status explicitly regarding OSPF or EIGRP. Similarly, querying EIGRP neighbors and topology focuses more on the adjacency and path metrics rather than interface status. Thus, the command that offers a broad view of the routing protocols, including their interface configurations, is the most effective for checking passive status.