Which of the following WLAN protocols is in the 5GHz band with a MAXIMUM data rate of 54Mbps?（）

单项选择题A Windows XP Professional PC needs to be checked for compatibility before being upgraded toWindows Vista Business. Which of the following would be the BEST action to take before theupgrade?（）

A. Run the Windows Vista Upgrade Advisor on the target pc.
B. Check the README file on the Vista installation dvd for system requirements.
C. Check the manufacturer’s support pages for system requirements.
D. Run the Windows AIK on the Vista installation dvd.

多项选择题Which of the following methods can be used to apply a file system to a hard drive partition?（）

A. Device Manager MMC
B. Format Command
C. Disk Management MMC
D. Windows Explorer Menus
E. FDISK Command

单项选择题A user wants to install a new game and needs to make sure the proper version of DirectX isinstalled. Which of the following is the BEST way to check for the DirectX version?（）

A. REGEDIT
B. services.msc
C. Dxdiag
D. msconfig

单项选择题A technician installs a new video card in a desktop with onboard video. The technician boots the unit but sees no display. The monitor power light is on and the OS seems to be loading. Which ofthe following is the MOST likely cause?（）

A. The display is defective.
B. The video card needs to be flashed.
C. The internal adapter has not been disabled.
D. The new video card is defective.

单项选择题A technician just installed an antivirus suite on a workstation. It is kept up-to-date and has recently scanned the system. A day later the user reports slower response times than usual. Which of the following is the user MOST likely experiencing?（）

A. Advertisements
B. Resource consumption
C. A trojan infection
D. Unremoved viruses