Which command would you use to view active sessions on a FortiGate device?

The command "get sys session" is the correct choice for viewing active sessions on a FortiGate device. This command provides detailed information about current sessions, including session state, source and destination IP addresses, ports, and other relevant details. It is specifically designed for administrators to quickly check active connections and analyze session-related information.

Commands that may appear to be intuitive, like "show active sessions," "display current sessions," or "view session status," do not exist within the FortiGate command-line interface. They might reflect an understanding of general networking or firewall command structures, but they do not provide the necessary syntax or functionality for viewing active sessions on FortiGate. Hence, the command "get sys session" is the accurate and effective choice for this purpose.