题目内容
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[单选题]
Awebserverhastobeavailableallthetime.Ithasitsownredundantpowersourceanduninterruptiblepowersupply(UPS).Whichofthefollowingactionswillprovideadditionalfault to lerance?()
A.AddasecondDVDdrive
B.Addanextendedruntimemodule(ERM)totheUPS
C.Configureautomatedsystemrecovery(ASR)
D.AddasecondNIC
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