CREST Practitioner Security Analyst (CPSA) Practice

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What is one of the functionalities provided by the X11 system?

Data encryption for secure communication
Drawing and moving windows on the display
Managing SQL queries
Performing virtual desktop connections

The correct answer is: Drawing and moving windows on the display

The X11 system, also known as the X Window System, is primarily designed to provide a graphical environment for Unix and Unix-like operating systems. One of its key functionalities is the ability to manage the graphical display, which includes drawing and moving windows on the screen. This capability enables multiple applications to have graphical interfaces that can be rendered simultaneously, allowing users to interact with them through mouse and keyboard inputs. The X11 system achieves this by acting as a client-server model where the X server displays the graphics, while various applications (the X clients) communicate with the server to create windows, draw graphics, and respond to user input. This design allows for flexibility in managing multiple windows on the desktop interface, including resizing, minimizing, or moving them, which enhances user experience and multitasking capabilities. Other functionalities like data encryption, managing SQL queries, or performing virtual desktop connections are not inherent to the X11 system itself. These tasks may involve other software or protocols specifically designed for those purposes.