A Dynamic Routing Gateway (DRG) in Oracle Cloud Infrastructure (OCI) is a virtual router that provides a path for private traffic between your on-premises network and your VCN, or between your VCN and other VCNs. The resources that can be attached to a DRG include:

A. Virtual Circuits: Used to establish a private connection between your on-premises data center and your VCN via Oracle’s FastConnect service.

D. Remote Peering Connections: Enables peering between VCNs located in different regions (Remote VCN Peering).

E. IPSec Tunnel: Facilitates secure VPN connections between your on-premises network and your OCI VCN.