单项选择题
A. Default gateway
B. The ports on the switch
C. Port security on the server's switch port
D. Ethernet cable
单项选择题 Atechnicianwantstodecreasetheoverallattacksurfaceoftheserversinadatacenterthrough decreasingthenumberofopennetworkportsoneachserver.Whichofthefollowingcouldthe technicianimplementtoincreasesecurity？（）
单项选择题 WhichofthefollowingisabenefitofRAID1？（）
单项选择题 RAID5canbeBESTdescribedaswhichofthefollowing？（）