单项选择题
When troubleshooting an 802.11g network. Which of the following can interfere with the network?（）
A. 2.4 GHz cordless phone
B. 900 MHz cordless phone
C. Bluetooth headset
D. Bluetooth printer
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A technician is troubleshooting a monitor displaying a blank screen and the power indicator light ison. Which of the following should the technician do next?（）
A. Test the computer with a known-good monitor.
B. Check if the monitor is still covered under the manufacturer’s warranty.
C. Replace the monitor’s power cord with a known-good power cord.
D. Swap out the computer’s video card. -
单项选择题
A user states that their work PC has become infected with a virus. Which of the following shouldthe technician do FIRST?（）
A. Perform an antivirus program scan
B. Boot the machine into Safe Mode
C. Remove the machine from the network
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单项选择题
A user has recently added a second IDE CD-RW drive to a machine in addition to the primary DVD-ROM drive. The drive opens and closes; however, they do not see it show up in Windows. Which of the following is the MOST likely cause?（）
A. The drive jumper settings are incorrect.
B. The drive is not receiving power from PSU.
C. Windows only supports one optical drive.
D. The user connected the drive with a SATA cable.
