A technician needs a graphical remote desktop session to a Windows PC. Which port does that session use?
Select an answer to reveal the explanation.
Short Explanation
The session has to show the whole desktop, not a command line and not a file share. You permit TCP 3389. The encrypted shell, the clear-text terminal, and file sharing are other ports.
Full Explanation
Remote Desktop Protocol carries a graphical session, and it uses TCP port 3389. That is the port for the technician's remote desktop. TCP port 22 is SSH, a command line. TCP port 23 is Telnet, also a command line, and it is not encrypted. TCP port 445 is SMB file sharing. None of those is the graphical desktop. Exam caveat: the PC has to allow remote desktop, and the account has to be permitted. An open port with the feature turned off still will not show the desktop. Operational check: permit TCP 3389, connect with a remote desktop client, and confirm you see the PC's graphical session. Confirm the session shows the desktop, then close it so the port is not left in use. Record the result on the ticket.