A user is trying to use Remote Desktop to connect to another computer on the LAN. The connection fails. The technician opens up a command prompt and types the following “telnet computername 3389” and also gets the same error message. Which of the following is the MOST likely cause of this error, assuming that the OS firewall has been disabled?
A. The antivirus software is blocking the incoming connection.
B. The ISP is blocking Remote Desktop at their end.
C. The RDP connection has been configured to use a non-standard port.
D. The telnet service has not been installed.