What port is used by RDP for remote desktop connections?

The correct choice identifies TCP port 3389 as the default port used by Remote Desktop Protocol (RDP) for establishing remote desktop connections. This protocol is widely utilized for allowing users to connect to another computer over a network connection, enabling control of the desktop interface remotely.

RDP utilizing TCP port 3389 ensures a reliable communication channel, as TCP is a connection-oriented protocol that guarantees data delivery and order between the client and the remote machine. This port specifically is utilized by the RDP service on Windows environments, facilitating the secure transmission of keyboard strokes and mouse movements back and forth between devices.

Understanding the function of this port is crucial for configuring firewalls or security settings to allow RDP connections, as well as for troubleshooting connectivity issues. Being aware that this is the designated port for RDP can help in scenarios where remote access solutions are deployed in network configurations.