单项选择题
A.Use recovery console and the bootcfg /rebuild command.
B.Use recovery console and the chkdsk command.
C.Use recovery console and the fixboot command.
D.Use recovery console and the fixmbr command.
单项选择题 InwhichofthefollowingscenarioswouldMACfilteringbeMOSTeffectiveasapartofwirelesssecurity？（）
单项选择题 AtechniciancannotconnectusingRemoteDesktop.Whichofthefollowingportsneedstobeallowedinthefirewall？（）
单项选择题 Aclienthascalledwithconcernsthattheircomputerproblemhasnotbeenresolvedbytheonsitetechnicianwhohasleft.Asthetechnicianssupervisor，whichofthefollowingistheBESTcourseofactioninthissituation？（）