When configuring transitive routing with a DRG across multiple VCNs and on-premises networks, which key configuration step ensures that traffic from one VCN is correctly routed through the DRG to an on-premises destination?

Transitive Routing Goal: Traffic from a VCN to an on-premises network via DRG. DRG Role: Acts as a virtual router connecting VCNs and on-premises networks. Routing Options: Static Routes: Manually defined, less scalable for dynamic environments. Dynamic Routing (BGP): Automatically exchanges routes, ideal for hybrid setups. Evaluate Options: A: Static routes work but require manual updates; less efficient. B: BGP dynamically propagates routes, ensuring correct routing; best fit. C: LPG is for intra-region peering, not on-premises connectivity; incorrect. D: Service Gateway is for OCI services, not on-premises; incorrect. Conclusion: BGP ensures scalable, accurate routing through the DRG. The DRG supports transitive routing with dynamic protocols like BGP. The Oracle Networking Professional study guide states, "For transitive routing between VCNs and on-premises networks via a DRG, configuring BGP on the DRG and CPE enables automatic route propagation, ensuring traffic is correctly routed" (OCI Networking Documentation, Section: Dynamic Routing Gateway). BGP is preferred over static routes for hybrid cloud scenarios.
Reference: Oracle Cloud Infrastructure Documentation - Dynamic Routing Gateway.