The image shows VNet peering topology in a single Azure region hosts two application VNets peering with a Data VNet:

• Application X 172.16.0.0/16 hosts Application X subnet 172.16.0.0/24 with an Application VM
• Application Y 10.1.0.0/16 hosts Application X subnet 10.1.0.0/24 with an Application VM

The Data VNet 10.0.28.0/22 hosts a delegated client subnet 10.0.28.0/27 which hosts Oracle Database@Azure.