Which two statements are true about the requirements of connected physical interfaces on FortiGate operating in NAT mode? (Choose two)

In NAT mode, FortiGate devices manage traffic in a way that requires certain configurations for connected physical interfaces. The correct choice, stating that both interfaces must have directly connected routes on the routing table, underlines a crucial aspect of routing and communication within NAT environments.

When operating in NAT mode, the FortiGate device often connects multiple interfaces—commonly a trusted internal interface (such as LAN) and an untrusted external interface (like WAN). For effective packet routing and communication between these interfaces, it is essential that both have routes in the routing table that directly connect them to each other. This ensures that the FortiGate can correctly process and forward packets between the different networks represented by these interfaces.

The requirement for connected routes is critical because without them, the device may lack the necessary information to send traffic to the appropriate destination, potentially resulting in communication failures or interruptions in connectivity.

In contrast, the other options lack the essential routing requirements or impose unnecessary restrictions. For instance, there is no mandate that every interface must have an IP address assigned or that only one interface should have a route. Such misconceptions could lead to misconfigured devices, affecting their performance in a live network environment.