The image shows an architecture diagram of an on-premises data center and an availability domain in an Oracle Cloud region.

The on-premises data center has a CPE (customer premise equipment), a bastion host, a primary database, and a password wallet. An IPSEC VPN FastConnect links the CPE to the Dynamic Routing Gateway in the VCN in the Oracle Cloud region.

The Oracle Cloud Region has one availability domain with a public subnet that contains a bastion host and a private subnet that contains the standby database instance and a password wallet. The region has a VCN, Dynamic Routing Gateway, Service Gateway, and a route table and a security list for each subnet.