Which layer contains the Site database in a Citrix Virtual Apps and Desktops Architecture model?

The Control layer contains the Site database in a Citrix Virtual Apps and Desktops Architecture model. The Site database stores the running site configuration, plus the current session state and connection information. The Access layer contains the components that users need to connect to their apps and desktops, such as StoreFront and Citrix Gateway. The User layer contains the user profiles, policies, and data. The Resource layer contains the machines that host the apps and desktops, such as VDAs and hypervisors