+The following diagram shows the high-level relationship between the system components:
+
+.. image:: images/High_Level_Architecture_SDC.png
+
+The SDC architecture uses the Jetty server as an application server.
+
+- The **Jetty front end**:
+ - supplies the static content of the web pages and all the resources that are required by the GUI
+ - serves as a proxy for the REST API requests coming from the GUI
+
+ Every request originating from the GUI is passed to the Jetty front-end server before it is executed.