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TightVNC is a cross-platform open source remote desktop software application that uses and extends VNC's RFB protocol to control another computer's screen remotely. The software is free and distributed under the terms of the GNU General Public License. The extensions provide for 'tight encoding', which improves performance over low bandwidth connections.
TightVNC is cross-compatible with other client and server implementations of VNC however tight encoding is not supported by most other implementations so it is necessary to use TightVNC at both ends to gain the full advantage of its enhancements.
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TightVNC uses so-called "tight encoding" of areas, which is effectively a combination of JPEG compression and other types of encoding. It is possible to watch videos and play DirectX games through TightVNC over a broadband connection, albeit at a low frame rate. TightVNC combines many other common features of VNC derivatives, such as file transfer capability.
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