Which command is used to check the status of interfaces on a Cisco device?

The command "show ip interface brief" is a widely used command in Cisco networking devices that provides a concise summary of the status and protocol state of all interfaces on the device. It displays useful information such as the interface name, IP address, and whether the interface is up or down, making it an efficient way for network administrators to quickly assess the operational status of interfaces.

Using this command is particularly advantageous because it aggregates information about both the physical and logical states of the interfaces in an easy-to-read format. By leveraging this command, a network technician can rapidly diagnose issues related to interface connectivity and ensure that configurations are correctly applied.

In contrast, commands that don't provide this specific output or that pertain to non-Cisco devices would not be applicable in this context. "show interface status" and "display interface brief" do not exist as standard commands on Cisco IOS, while "check interface status" is not a recognized command at all. Hence, "show ip interface brief" stands out as the only accurate and useful command for this purpose.