The user experience can be controlled in the devices outside of XenDesktop's control, such as network routers and switches. You can assign priorities to network traffic across multiple connections for a session in routers and switches that support QoS. XenDesktop ICA/HDX traffic uses four TCP connections, and one UDP connection carries the ICA/HDX traffic between the user device and the server. Each virtual channel or the
ICA/HDX protocol stream is coupled with a priority and transported on the corresponding connection. You can set the priorities for each ICA/HDX stream independently, based on the TCP port number used for the connection.
The four priorities are as follows: