What is the purpose of the FortiGate ‘diagnose debug flow’ command?

The ‘diagnose debug flow’ command in FortiGate is used to troubleshoot how packets are processed through firewall policies, showing details like policy matching, NAT, and session handling. It helps identify why packets are allowed or dropped. Option A refers to packet sniffing, B to routing diagnostics, and D to performance monitoring, none of which are the primary function. Exact extract: "The diagnose debug flow command displays the packet flow through FortiGate, including policy matching, NAT, and session details, useful for troubleshooting traffic issues."