X Protocol

The X Protocol (X or X11) is a display protocol that primarily displays and manages UNIX graphical information. The X Server program handles requests for displaying information and returns user input, such as keyboard or mouse use. It makes requests to the server for windows to be drawn, closed, etc. X protocol is primarily used on Linux machines to access the graphical aspects of the terminal.

You may use X forwarding for ECE or MAE classes to run CAD tools remotely. However, you’ll more than likely see RDP or AVD nowadays