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RealVNC is a company that provides remote access software. Their VNC Connect software consists of a server (VNC Server) and client (VNC Viewer) application, which exchange data over the RFB protocol to allow the Viewer to control the Server's screen remotely.
The Olivetti & Oracle Research Lab (ORL) [3] at Cambridge in the UK developed VNC at a time when Olivetti and Oracle Corporation owned the lab. Developers who worked on VNC while at the AT&T Research Lab include Tristan Richardson (inventor), Andy Harter (project leader), Quentin Stafford-Fraser, James Weatherall and Andy Hopper. [4]
TightVNC uses so-called "tight encoding" of areas, which improves performance over low bandwidth connection. It is effectively a combination of the JPEG and zlib compression mechanisms. [5] [6] It is possible to watch videos and play DirectX games through TightVNC over a broadband connection, albeit at a low frame rate. [citation needed]
In order to keep the device as simple as possible, RFB was developed and used in preference to any of the existing remote display technologies. RFB found a second and more enduring use when VNC was developed. VNC was released as open source software and the RFB specification published on the web. Since then RFB has been a free protocol which ...
In the table above, the following terminology is intended to be used to describe some important features: Listening mode : where a server connects to a viewer. The server site does not have to configure its firewall/NAT to allow access on a defined port; the onus is on the viewer, which is useful if the server site has no computer expertise ...
UltraVNC allows the use of a remote computer as if the user were in front of it. This is achieved by sending mouse movements and key-presses to the remote computer, and replicating the remote computer's display (subject to differences in resolution) locally in real time. UltraVNC bears a strong resemblance to RealVNC Free Edition.
The past few years however, Cendio AB who use it for their product ThinLinc is the main contributor to the project. [5] TigerVNC is fully open-source , with development and discussion done via publicly accessible mailing lists and repositories.
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