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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.
TigerVNC is an open source Virtual Network Computing (VNC) server and client software, started as a fork of TightVNC in 2009. [2] The client supports Windows, Linux and macOS. The server supports Linux. There is no server for macOS [3] and as of release 1.11.0 the Windows server is no longer maintained. [4]
In computer networking, LibVNCServer and LibVNCClient are cross-platform C libraries for the VNC server and client implementations. [2] [3] Both libraries support version 3.8 of the Remote Framebuffer Protocol, are fully IPv6-conformant and can handle most known VNC encodings.
Multiple clients may connect to a VNC server at the same time. There are a number of variants of VNC [2] which offer their own particular functionality; e.g., some optimised for Microsoft Windows, or offering file transfer (not part of VNC proper), etc. Many are compatible (without their added features) with VNC proper in the sense that a ...
x11vnc keeps a copy of the X server's frame buffer in RAM.The X11 programming interface XShmGetImage is used to retrieve the frame buffer pixel data. x11vnc compares the X server's frame buffer against its copy to see which pixel regions have changed (and hence need to be sent to the VNC viewers.)
Since the 2.0 beta, TightVNC supports auto scaling, which resizes the viewer window to the remote users desktop size, regardless of the resolution of the host computer. [citation needed] TightVNC 1.3.10, released in March 2009, is the last version to support Linux/Unix. [8] This version is still often used in guides to set up VNC for Linux. [9 ...
In Unix and other POSIX-compatible systems, the parent process can retrieve the exit status of a child process using the wait() family of system calls defined in wait.h. [10] Of these, the waitid() [11] call retrieves the full exit status, but the older wait() and waitpid() [12] calls retrieve only the least significant 8 bits of the exit status.
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.