The image shows a non-OCI clouds region, an on-premises region, and an OCI region, which contains a VCN with public and private subnets, which connect to each other.

The non-OCI region contains applications that connect, via the Internet, to a flexible load balancer in the OCI region, which connects to applications (virtual machine and container) in the public subnet.

The on-premises region connects to the OCI region via site-to-site VPN, or Oracle Cloud Infrastructure FastConnect. A dynamic routing gateway within the OCI region connects to high-availability Oracle MySQL Database Service systems in the private subnet.