单项选择题
A. Multicast
B. Active/passive cluster
C. Active/active cluster
D. DNS round robin
单项选择题 Whichofthefollowingarchivingmethodsonlybacksupdatathathaschangedsincetheprevious backup？（）
单项选择题 Aserverisexperiencinganundeterminedproblem.Whichofthefollowingstepsshouldthetechnician takeinordertoidentifywhetheritisasoftwareorhardwareproblem？（）
单项选择题 Deploying an operating system using WDS without a boot disk would require which of the following?（）