多项选择题
A. Enhanced stability
B. Vendor supported
C. Higher number of available component choices
D. Lower cost
E. Enhanced security
单项选择题 AWindowsserver’sbackupjobskeepfailingwithanerrormessagestatingthatthesourcedriveis notavailable.Afterreviewingthelogs，whichofthefollowingshouldatechniciandoFIRSTto troubleshootthisissue？（）
单项选择题 WhichofthefollowingBESTdescribesservervirtualization？（）
单项选择题 Whichofthefollowingvirtualizationtechnologiescansavetimeduringprovisioning？（）