The image shows OCI Region 1 consisting of a VCN containing Subnet A. Subnet A contains a Virtual Machine connected to File Storage, Boot Volume and Block Volume and Autonomous Database.
There is an OCI Region 2 containing Subnet A. Subnet A contains an App Server connected to File Storage, Boot Volume and Block Volume and Autonomous Database.
The Autonomous Database in OCI Region 1 is connected to the Autonomous Database in OCI Region 2 via Data Guard.
The VCN in OCI Region 1 is connected to the VCN in OCI Region 1 via DRG through RPG.
The Boot Volume and Block Volume in OCI Region 1 are connected to the Boot Volume and Block Volume in OCI Region 2 via Cross region replication.
The File Storage in OCI Region 1 is connected to the File Storage in OCI Region 2 via Cross region replication.