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?（）

单项选择题 A PC administrator is trying to implement BitLocker full disk encryption but the PC reports that asecurity module is not found. Which of the following should the administrator do to correct this?（）

单项选择题 A technician notices that the WAP keeps getting a different IP address after it is restarted. Whichof the following is the FIRST step to take to ensure the IP address assigned does not change?（）