The image shows an On-Premises Network and an AWS Region connected using Direct Connect.

The On-Premises Network hosts an on-premises router, Application VM, and Oracle Database.

The AWS Region hosts Transit Gateway as the hub. Easch of the spokes connect using Transit Gateway Attachments to the Direct Connect Gateway, an Application VPC and subnet that uses ODB peering connectivity to connect to the ODB network hosting Oracle Database@AWS, and a Firewall VPC and subnet that hosts the Firewall.