单项选择题 An administrator has just finished physically replacing the system board in a Windows domain controller. Which of the following must be done before booting the server back into Windows?（）

单项选择题 Acompanyhasseverallegacyserversthatuppermanagementwouldliketomoveintoavirtual environment.WhichofthefollowingistheFIRSTstepanadministratorshouldtaketoevaluating whethertheserverscanbemovedintothevirtualenvironment？（）

单项选择题 How many wire pairs are in a standard CAT6 cable?（）