The image shows an architecture having an OCI Region with a single VCN having two private subnets: Private Subnet A and Private subnet B. The VCN spans across and availability domain named Availability Domain 1.

The OCI Region hosts Oracle Fusion Cloud Applications which uses BICC to connect and load data into Object Storage inside the VCN.

Oracle Data Transforms is hosted inside Private Subnet B within the availability domain and Object Storage connects to it.

Oracle Data Transforms connects to Autonomous Data Warehouse which sends the data through OCI GoldenGate hosted in Private Subnet A.

OCI GoldenGate loads the data into the Snowflake Data Warehouse located within the OCI Region but outside the VCN through a DRG.