Interface Status of a Router

B

The correct answer is B. show ip interface brief.

Explanation: The command "show ip interface brief" displays a summary of the status and configuration of all interfaces on a router, including the IP address assigned to each interface, the method of assigning the IP address, and the operational status of the interface.

The command "show interface" displays detailed information about a specific interface, including the hardware and software status of the interface, statistics on packet transmission and reception, and the configuration of the interface.

The command "show interface status" displays a summary of the status of all interfaces on a router, including the status of the physical layer (up or down), the status of the data link layer (up or down), and the status of the protocol running on the interface (up or down).

The command "show ip route" displays the current routing table on the router, including the network destinations, the next-hop addresses, and the interfaces used to reach each destination.

Therefore, the correct command to show the interface status of a router is "show ip interface brief."