单项选择题 Which of the following media types is considered a solid state?（）

单项选择题 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?（）