What is the role of the FortiGate ‘set srcintf’ command in a firewall policy?

The ‘set srcintf’ command in a FortiGate firewall policy specifies the source interface from which traffic originates, helping define the policy’s scope. It does not set the destination interface (B), source IP range (C), or NAT interface (D). Exact extract: "The ‘set srcintf’ command in a firewall policy specifies the source interface for incoming traffic, allowing FortiGate to match packets based on their entry interface."