X11

X11, also known as the X Window System, is a network-based technology that allows multiple devices to display and interact with graphical interfaces on a computer. It provides the foundation for managing windows, graphics, and user input in Unix and Linux operating systems. Essentially, X11 separates the user interface from the operating system's core functions, enabling remote access and flexible display management. It acts as a communication protocol between applications and display hardware, allowing users to run software on one machine while viewing and interacting with it on another.