单项选择题

A user is trying to boot a desktop PC from their A: drive. Which of the following devices is the userdescribing？（）

A. The floppy drive
B. The hard drive
C. The CD-ROM drive
D. The DVD-ROM drive

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单项选择题

A technician is troubleshooting a WLAN card in a laptop. The wireless infrastructure is 802.11g. TheWLAN card is showing connected at 11Mbps. Which of the following would be the BEST reason why theWLAN card is performing at that speed? （）

A. The WLAN card is 802.11g.
B. The WLAN card is 802.11b.
C. The WLAN card is 802.11n.
D. The WLAN card is 802.11a.

单项选择题

After a technician installs a new CMOS battery on a motherboard, which of the following will thetechnician have to change? （）

A. Firmware version
B. System date/time
C. Bus speeds
D. Jumper settings

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