The image shows VPC peering topology in Google Cloud with three projects: Project HR, Project Data, and Project Sales all which connect with each other using Peering Cloud DNS peering zone.

Project HR has a VPC Dev HR with Subnet 192.168.1.0/24.

Project Data has a VPC Dev (transit) with two subnets with Oracle Database@Google Cloud with a Database network with the following details:

Subnet 172.16.1.0/24 hosts Oracle Exadata Database Service within the Database network.
Subnet 172.6.2.0/24 hosts Oracle Autonomous Database within the Database network.

Project Sales has a VPC Dev Sales with Subnet 10.0.1.0/24.