单项选择题
A.Compressed air
B.Vacuum
C.Soap and water
D.Disinfecting wipes
单项选择题 WhichofthefollowingistheBESTrecoverymethodforaserverthatonlyaggregatesreportdataand storesdataonseparateservers？（）
单项选择题 Atechnicianatasmallbusinessgoesintotheserverroomtoperformmaintenanceonaserver andnoticesitisveryhotandaudiblealarmsaregoingoff.Thetechnicianisunsureofhowto remedythesituation.Whichofthefollowingshouldthetechniciando？（）
单项选择题 Whichofthefollowingtechnologiesallowsmultiplelogicalsubnetstospananentirephysicalswitched network？（）