What protocol provides a graphical interface to connect to another computer over a network connection (port 3389)?

What protocol provides a graphical interface to connect to another computer over a network connection (port 3389)?

• A. Remote Desktop Protocol (RDP)
• B. Virtual Network Computing (VNC)
• C. Unified Communications
• D. Domain Name System (DNS)

Answer: (A)

This question tests knowledge of remote desktop protocols that provide a graphical interface to control another computer over a network, specifically using port 3389. The protocol that fits this description is the Microsoft Remote Desktop Protocol, which is designed to deliver a full graphical session of the remote machine and is configured by default to use port 3389. While Virtual Network Computing also offers remote graphical access, it typically uses a different port range (such as 5900) and is not associated with port 3389. DNS, on the other hand, is used for resolving hostnames to IP addresses and does not provide remote desktop capabilities. Unified Communications focuses on collaboration tools and does not provide remote graphical control.