Final answer:
Protocol XWindow belongs to the Presentation layer in both the DOD and OSI models, uses port 6000, stands for X Window System, and functions as a windowing system for graphics.
Step-by-step explanation:
The correct answer to your question about which layer the Protocol XWindow belongs to in the DOD model and the OSI Model, as well as its port number, what it stands for, and its function is: A) DOD Model: Presentation, OSI Model: Presentation, Port: 6000, Stands for: X Window System, Function: Windowing system for graphics.
The X Window System is a network-transparent window system which allows for graphical user interfaces in distributed network environments. It operates over the network, allowing the client and server to be on different machines. The presentation layer in both the Department of Defense (DoD) and Open Systems Interconnection (OSI) models is responsible for data representation and security, which includes encryption and decryption. This layer would encompass the X Window System as it's concerned with the syntax and semantics of the information transmitted.
Port 6000 is typically used by the X Window System for its network operations.