The output from the diagnose firewall proute list command shows a policy route with the attribute sdwanserviceid=1. This specific attribute indicates that the route was not manually created as a standard policy route but was dynamically generated by an SD-WAN rule. SD-WAN rules are implemented in the FortiOS routing table as policy routes with high-numbered IDs (like 2048 in this case) and are explicitly linked to an SD-WAN service, making them distinct from regular or ISDB-based policy routes.

A. The output does not contain any reference to an Internet Service Database (ISDB) object, which would be explicitly mentioned if it were an ISDB route.

B. A regular policy route would typically specify a gateway IP address and would not include the sdwanserviceid attribute.

C. This option is incorrect because there is no indication of an ISDB object being used in the policy route shown in the output.

1. Fortinet. (2023). FortiOS Administration Guide 7.2.4. Page 588. "SD-WAN rules are implemented as policy routes."

2. Fortinet. (2023). FortiOS CLI Reference 7.2.4. Page 684. The output fields for diagnose firewall proute list include sdwanserviceid, which is described as the "SD-WAN service ID".