单选题A technician is trying to connect from a home computer to their office computer, but cannotconnect via Remote Desktop. Which of the following ports needs to be open for RDP traffic to be allowed?（）A21B80C443D3389
单选题
A technician is trying to connect from a home computer to their office computer, but cannotconnect via Remote Desktop. Which of the following ports needs to be open for RDP traffic to be allowed?（）
A
21
B
80
C
443
D
3389
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解析：
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