The image shows a hub-and-spoke on-premises topology with an on-premises network region connected using Express Route to an Azure Region.

The On-premises network region hosts:

• An Application VM.
• An on-premises router connecting to the virtual network gateway in the Hub VNet of the Azure region.

The Azure region hosts:

• A Hub VNet which hosts a Gateway subnet 10.1.1.0/24 with a virtual network gateway.
• A Data VNet 10.0.28.0/22 which hosts a delegated Client subnet 10.0.28.0/27 including UDR and hosts Oracle Database@Azure.