单项选择题
A. Poor performance
B. No fault tolerance
C. Not supported by many RAID controllers
D. Higher cost
单项选择题 An administrator replaces the network card in a web server. After replacing the network card some users can access the server but others cannot. Which of the following is the FIRST thing the administrator should check?（）
单项选择题 Atechnicianwantstodecreasetheoverallattacksurfaceoftheserversinadatacenterthrough decreasingthenumberofopennetworkportsoneachserver.Whichofthefollowingcouldthe technicianimplementtoincreasesecurity？（）
单项选择题 WhichofthefollowingisabenefitofRAID1？（）