* Objective:Enable transitive routing via a network appliance (e.g., firewall) between VCNs.
* Transitive Routing Setup:DRG connects VCNs; appliance processes traffic.
* Key Requirement:DRG must route traffic to the appliance's private IP.
* Evaluate Options:
* A:Service Gateway is for OCI services, not transitive routing; incorrect.
* B:Static routes on DRG to appliance ensure correct traffic flow; essential.
* C:Load Balancer is optional, not essential for routing; incorrect.
* D:LPG is for intra-region VCN peering, not appliance-DRG connection; incorrect.
* Conclusion:DRG static routes to the appliance are critical for transitive routing.
Transitive routing with a network appliance requires explicit routing configuration. The Oracle Networking Professional study guide notes, "To enable transitive routing through a network appliance, configure static routes in the DRG route table pointing to the appliance's private IP as the next hop" (OCI Networking Documentation, Section: Transitive Routing with DRG). This ensures traffic is processed by the appliance between VCNs.