SummaryIf using Terminal Services over a WAN compression will not help minimize the traffic over the WAN link due to the heavy compression featured in those protocols by design
OverviewTerminal services applications and protocols such as VNC, RDP, and Citrix, are protocols that are designed from the ground up to transmit as little data as possible. Keystrokes, mouse movements and screen images are all transmitted over those protocols, but are meant to do so in a way that will not overwhelm in terms of bandwidth, as there are often many such sessions running simultaneously, or they are running to sites that do not have the power or bandwidth to run the systems locally. As a result, any terminal services protocol is extremely efficient and lightweight. Depending on what extra features are on, Microsoft's Remote Desktop Protocol can use as little as 30kbps.
These protocols are incredibly efficient by design. When putting them through the Exinda in the hopes that WAN acceleration via compression will assist lowering the bandwidth consumption, the traffic will not see any noticeable gains. Compression standards vary wildly depending on the type of technology is used, and some traffic is more compressible than others. These terminal services protocols are not very compressible due to their already small nature. As a result, the compression results on the optimization of the Exinda will not show high gains for this type of traffic.