And, because you have to transmit an entire desktop worth of graphics, this can be slow and unresponsive if your network connection isn’t up to it. But that gives you a separate “box” on your screen that often “feels” very unlike the local applications you might be running on your own machine. Now, you can do remote access with Windows as well (“remote desktop”). That means that, even if you are not seated at a Unix or Linux system, you can run programs on a remote Unix/Linux machine and you can see and interact with programs that are running on some other, remote machine somewhere else on the network.
The reason that X is of interest in this course is that X was designed, from its beginnings, for remote use. Most of the time, you are less interested in Windows than in the programs that you are running under it. If you were seated at a Unix or Linux system, you would treat X much the same as you normally treat Microsoft Windows on most PCs - it’s there, it lets you launch your programs, and it makes things look pretty. X also allows the display of graphics and of a variety of fonts.
For example, you can be reading electronic mail in one window while a lengthy compilation is running in another. By running X, you can have several windows on the screen open at once, each devoted to a different task.
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