Final answer:
An Azure Web App querying an on-premises MS SQL server demonstrates a Hybrid Cloud model, combining on-premises infrastructure with cloud services.
Step-by-step explanation:
An Azure Web App that queries an on-premises MS SQL server is an example of a Hybrid Cloud model. This setup involves a combination of both on-premises infrastructure and cloud services, allowing for resources to be shared between them. The ability to integrate on-premises databases like MS SQL Server with cloud-based applications is a definitive characteristic of a hybrid cloud.