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That is, an X application running on a host on network can display output on an X - window on some other host, also, on the network, provided the host running the application has been configured for remote login. However, the client and X server can be located on different hosts on a network. The client application and the X server are usually located on the same host computer. An application (or client) does the work and sends requests to the X11 server, or simply, the X server for display. X11 server is the display server that manages the output on the bit-mapped display hardware. X - Window system is a network-transparent window system.
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