Centralized Hub: DRGs act as central points of connection for multiple VCNs across regions. This allows you to manage all your on-premises to VCN connections from a single place, simplifying administration and reducing complexity.
Private Connectivity: DRGs facilitate secure, private communication between your on-premises network and VCNs by leveraging private peering instead of the public internet. This enhances security and reduces the risk of data breaches.
Flexible Connectivity: DRGs support various peering options, including local peering for connections within the same region, remote peering for connecting across regions, and cross-tenancy peering for connecting to VCNs in other accounts. This flexibility caters to diverse connectivity needs.
Scalability: DRGs can accommodate growing needs as you add more VCNs or on-premises connections. The centralized approach scales efficiently without requiring individual configurations for each new connection.
Comparison with other options:
Service Gateway (A): Primarily for managing outbound internet traffic within a VCN, not suitable for on-premises connections.
Internet Gateway (B): Provides public internet access within a VCN, not intended for secure cross-region connections with an on-premises network.
NAT Gateway (C): Improves outbound security by hiding internal IP addresses, but doesn,t provide centralized routing or secure connectivity for on-premises networks.