What does the command 'show version' provide about a Cisco device?

The command 'show version' is utilized on Cisco devices to present critical information regarding the system's hardware and software. This includes details such as the device’s model number, the amount of memory, the type of processor, the version of the operating system (IOS), and the software's build number. It may also provide information on the device's uptime, the hardware's capabilities, and licensing details. Understanding this information is essential for network administrators to ensure that the device is running the appropriate software version and to facilitate troubleshooting and system management.

The other options pertain to different commands: interface status and performance may be checked using 'show interfaces', device configuration settings are typically displayed using 'show running-config', and active user sessions might be viewed using commands like 'show users' or 'show ip user session'. Each of these commands serves its specific purpose and does not overlap with the information provided by 'show version'.