单项选择题 An administrator installs a new network card in a properly functioning DC. During the Windows boot up process the DC bluescreens. Which of the following is the NEXT step?（）

单项选择题 Which of the following RAID levels supports fault tolerance by writing parity to only one drive in the array?（）

多项选择题 Which of the following should be kept in uninterruptible power supply (UPS) documentation records?（）