单选题A user is trying to use Remote Desktop to connect to another computer on the LAN. Theconnection fails. The technician opens up a command prompt and types the following: “telnetcomputernamE. 3389” and also gets the same error message. Which of the following is the MOSTlikely cause of this error, assuming that the OS firewall has been disabled?（）AThe antivirus software is blocking the incoming connection.BThe ISP is blocking Remote Desktop at their end.CThe RDP connection has been configured to use a non-standard port.DThe telnet service has not been installed.
单选题
A user is trying to use Remote Desktop to connect to another computer on the LAN. Theconnection fails. The technician opens up a command prompt and types the following: “telnetcomputernamE. 3389” and also gets the same error message. Which of the following is the MOSTlikely 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.
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