单项选择题
Which of the following commands should Mike, a technician, use to display the available switches of a command line utility?（）
A. DIR /S B. MSINFO C. ATTRIB -H D. HELP
A user has just moved a PC from one office to another. ...
单项选择题A user has just moved a PC from one office to another. The patch cable and the NIC do notappear to be functioning in the new office but were working before the move. The patch cable is plugged in correctly to both the NIC and the wall jack. Which of the following actions should the technician take FIRST?（）
A. Verify that the network card is compatible with the operating system. B. Verify that the port on the switch is enabled. C. Update the network card driver. D. Replace the network cable with a crossover cable.
Which of the following default ports must be opened to ...
单项选择题Which of the following default ports must be opened to allow a technician to telnet into a machine?（）
A.21 B.23 C.24 D.25
After opening up the lid of a laptop that is powered on...
After opening up the lid of a laptop that is powered on, nothing is displayed on the LCD. Opening and closing the lid multiple times usually causes the display to regain the signal. Which of the following components should the technician check FIRST?（）
A. Motherboard B. Video card C. Cutoff switch D. AC adapter
