What does the show ip interface command display?

• A. IPv4 related information for all interfaces on a router
• B. The ARP table
• C. The running configuration
• D. The status of VPN tunnels

Answer: (A)

This command focuses on IPv4 addressing and interface status across a router. It shows each interface’s IPv4 address and subnet mask, along with whether the interface is up or down and the line protocol status, plus other IPv4-related details like MTU and description. This combination—addressing plus operational state for every interface—is exactly what you need when you want to verify how IPv4 is configured and how the interfaces are behaving.

The other options don’t fit because you’d use different commands for those: the ARP table is shown with a command like show arp, the running configuration with show running-config, and VPN tunnel information with commands such as show crypto isakmp sa or other VPN-related show commands.