CompTIA A+ Core 1 (220-1201)NetworkingMedium
A help desk technician needs to remotely access the graphical desktop of a user's Windows workstation to troubleshoot a software issue. Which TCP port must be open on the workstation's firewall to allow this type of remote connection?
- A445
- B389
- C53
- D3389
Show answer & explanationAnswer & explanation
Correct answer: D. 3389
Remote Desktop Protocol (RDP) uses TCP port 3389 to allow a remote user to view and interact with a Windows machine's full graphical desktop. This differs from SSH, which only provides command-line access.
Why the other options are wrong
- A. 445 is used for SMB file sharing, not remote desktop.
- B. 389 is used for LDAP directory services.
- C. 53 is used for DNS name resolution.
RDP Port 3389
Remote Desktop Protocol uses TCP port 3389 to provide full graphical remote access to a Windows computer.
- Native to Windows Remote Desktop feature
- Should be secured with strong passwords or VPN due to attack risk
- Differs from SSH, which is command-line only
Memory trick: RDP: remote desktop, port thirty-three eighty-nine.