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Optimizing Citrix® XenDesktop® for High Performance by Craig Thomas Ellrod

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QoS

The most appropriate place to discuss quality of service (QoS) is in the networking section. We discuss QoS for XenDesktop here.

ICA/HDX virtual channels

Citrix supports QoS with the ICA/HDX protocol, and it is supported in the Citrix Receiver, as well. Within the ICA/HDX protocol, they have what are called virtual channels. Virtual channels exist so that control can be applied to specific functions such as printing, audio, keyboard, mouse, video, drive mapping, and so on. There are 32 maximum channels available for each ICA/HDX session. The following diagram shows the architecture of virtual channel:

ICA/HDX virtual channels

Multi-stream and multi-port

Multi-stream ICA/HDX ...

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