Discuss the basis of the X Window architecture.
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The basis for X Window architecture is the separation into a server component (X server) and the application itself (client application). The X server and client application communicate with each other by way of various communication channels.
• X server. The X server controls the graphical screen. This corresponds roughly to a graphics driver on other systems. In addition, it manages the input devices, such as keyboard and mouse, and transmits their actions to the X client. The X server, however, has nothing to do with the appearance of the window and the desktop; this is the task of the window manager. XFree86 and XOrg are free implementations of the X server. SLES 11 defaults to using XOrg.
• Client application. The client application is a graphical application that uses the services of the X server to receive keyboard and mouse actions and to have its own output displayed on the screen.
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