CompTIA Network+ (N10-009)Network OperationsEasy
A systems administrator needs to allow IT staff to remotely control the desktop of a Windows server through a firewall for maintenance tasks. Which TCP port must be permitted?
- A3389
- B22
- C389
- D5900
Show answer & explanationAnswer & explanation
Correct answer: A. 3389
Remote Desktop Protocol (RDP), used for graphical remote control of Windows systems, listens on TCP port 3389 by default.
Why the other options are wrong
- B. Port 22 is used by SSH, not RDP.
- C. Port 389 is used by LDAP.
- D. Port 5900 is used by VNC, a different remote-control protocol.
RDP Port 3389
Remote Desktop Protocol provides graphical remote access to Windows systems and uses TCP port 3389 by default.
- RDP is Microsoft's proprietary remote access protocol
- Default port is TCP 3389
- VNC (port 5900) is a cross-platform alternative
Memory trick: RDP = '33-89'... remember the 'Remote Desk-Port'.