The image shows an On-Premises region and an OCI Region connected using either FastConnect or Site-to-Site VPN.

The On-Premises region includes CPE or Customer premises Equipment.

The OCI Region includes four VCNs with three availability domains (AD 1, AD 2, AD3) intersecting all four VCNs. Each VCN uses a services gateway (SG). The OCI region hosts policies, IAM, Audit, Logging, and Object Storage.

• VCN-0 (Hub) uses SG-0 and hosts a subnet with IP address 10.01.0/24 and shared services and tools.
• VCN-1 uses SG-1 and hosts a subnet with IP address 10.0.2.0/24 and the production environment.
• VCN-2 uses SG-2 and hosts a subnet with IP address 10.0.3.0/24 and the test environment.
• VCN-3 uses SG-3 and hosts a subnet with IP address 10.0.4.0/24 and the development environment.