单项选择题
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
单项选择题 Which of the following should Karen, a technician, use to test a parallel port?（）
单项选择题 Which of the following locations would hold 32-bit application files in Windows Vista 64-bit?（）
单项选择题 Which of the following commands can be used to repair a corrupted boot record?（）
