Which protocol enables remote graphical desktop connections to a host and typically uses port 3389?

Which protocol enables remote graphical desktop connections to a host and typically uses port 3389?

• A. Remote Desktop Protocol (RDP)
• B. Virtual Network Computing (VNC)
• C. Hypertext Transfer Protocol (HTTP)
• D. Secure Shell (SSH)

Answer: (A)

Remote Desktop Protocol is the protocol designed to deliver a full graphical desktop experience over a network. It transmits the host’s screen updates to the client and sends keyboard and mouse input back, enabling a user to interact with the remote system as if they were sitting in front of it. By default, this protocol uses port 3389, which is why it’s commonly associated with remote graphical desktop connections to a Windows host. Other options either focus on different kinds of access or use different ports. VNC can also provide a graphical remote session but typically operates on port 5900 (and is often less feature-rich and secure by default). SSH is primarily for secure command-line access (though GUI can be tunneled with X11 forwarding in certain setups, not the standard remote desktop experience and it uses port 22). HTTP is for web traffic and isn’t designed to render a remote desktop graphical session.

Remote Desktop Protocol is the protocol designed to deliver a full graphical desktop experience over a network. It transmits the host’s screen updates to the client and sends keyboard and mouse input back, enabling a user to interact with the remote system as if they were sitting in front of it. By default, this protocol uses port 3389, which is why it’s commonly associated with remote graphical desktop connections to a Windows host.

Other options either focus on different kinds of access or use different ports. VNC can also provide a graphical remote session but typically operates on port 5900 (and is often less feature-rich and secure by default). SSH is primarily for secure command-line access (though GUI can be tunneled with X11 forwarding in certain setups, not the standard remote desktop experience and it uses port 22). HTTP is for web traffic and isn’t designed to render a remote desktop graphical session.