The UMS Console initiates a VNC session with the device. The standard port is 5900 (TCP); the port can be changed per session.
The following figure illustrates the communication between the UMS Console and a device:
UMS Web App
The UMS Web App requests the UMS Server to initiate a VNC session for shadowing. The VNC session is routed through the UMS Server; between the UMS Web App and the UMS Server, the data is transferred via WebSocket. The default port for the communication between the UMS Server and the devices is 5900 (TCP).
The following figure illustrates the communication between the UMS Web App, the UMS Server, and a device: