Remote Desktop Protocol - Wikipedia

3389 port tcp or udp TCP enables two hosts to establish a connection and exchange streams of data. TCP guarantees delivery of data and that packets will be delivered in the same order in which they were sent. Guaranteed communication/delivery is the key difference between TCP and UDP. UDP ports use the Datagram Protocol..

3389 port number used for  You should open TCP and UDP 3389 (unless you specified a custom port). While the accepted answer (only TCP 3389) used to be correct at the time, it is no longer up to date.

3389 02 vip  Likewise, what is port 3389 commonly used for? Port 3389 Basics TCP Port 3389 is used for the Windows Remote Desktop Protocol (RDP) and is also sometimes used by Windows Terminal Server. You may choose to allow or open this port in Windows Firewall to give another computer, either on the same network or another network, access to your computer.