What is the operation of the show ip int brief command?

• A. It displays a summary of all interfaces including the IPv4 address and the current operational status
• B. It reroutes traffic through the best path
• C. It shows detailed interface configuration including ACLs
• D. It pings all active interfaces

Answer: (A)

This command provides a quick snapshot of all interfaces by showing each interface’s IPv4 address (or unassigned) along with its current operational state. It’s ideal for rapidly verifying which interfaces have IP addresses and whether they’re up and functioning, without digging into full configurations. It doesn’t route traffic or make routing decisions, nor does it display detailed interface settings like ACLs. It also isn’t a connectivity test; to check reachability you’d use ping or a more verbose show command. The output’s concise format—interface name, IP address, and the status/line-protocol—lets you spot mismatches or unused interfaces at a glance.