WhenatechnicianlefttheserverroomMondayeveningeverythingwasoperational.Whenthe technicianreturnedTuesdaymorning，thefrontbezelwasoffofthemailserver，andithadbeen poweredoff.WhichofthefollowingshouldbecheckedFIRST？（）
A.TCP\/IPsettings
B.RAIDconfiguration
C.Whetherthepowercordisattached
D.Serverroomaccesslog
参考答案：D
