单项选择题

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

A.Whenthe
B.WhichofthefollowingshouldbecheckedFIRST?()
A.TCP/IPsettings
C.RAIDconfiguration
D.Whetherthepowercordisattached
E.Serverroomaccesslog