The image shows an OCI Region 1 - Prod containing an Availability Domain 1.

Availability Domain 1 VCN-0 (Hub) and VCN-1.

VCN-0 (Hub) contains a public subnet with Bastion Service. Users can access the public subnet via Internet Gateway.

VCN-1 contains one private subnet with GoldenGate Cloud and a second private subnet with ATP DB.

AWS Cloud hosts the AWS EC2, RDS Oracle databases, and PowerBuilder Apps connecting to the database with AWS DirectConnect through Equinix Exchange Fabric and OCI FastConnect.

GCP hosts the .NET, Go-Lang and other open source applications connecting to the database with Google Interconnect through Equinix Exchange Fabric and OCI FastConnect.