单项选择题
A.Has there been any recent loss of data？
B.How many tape drives are in the Library？
C.What tape technology is currently being used？
D.What software is being used for restoring the data？
单项选择题 Acustomerrequiresoff-sitestoragefor500GBpernightinbackuptapes.Thebackupsiteis560kilometers（350miles）away.Thecustomerdoesnotrequirethebackupsitetoruntheapplicationintheeventoffailureatthemainsite.Whatistheleastexpensivestrategyforthedatacentertoimplement？（）
单项选择题 AspartofaBusinessContinuanceproject，acustomerhasestablishedreplicationfrom3spokestoaDRhubwithProtecTIER7610appliances.Eachofthe3spokesisbackingup500GBofnominaldatadailywithanaveragededuplicationratioof10：1.Thereplicationwindowis12hours.Thedatachangerateis15%.WhatistheapproximateminimumrequiredbandwidthforeachWANconnection？（）
单项选择题 AcustomerhasarequirementforDisasterRecoveryforcompliancewithintheirindustry.TheyhaveanRPOof4hoursandanRTOof24hours.Costisaconsideration.WhatisthemostcosteffectiveDRimplementation？（）