单项选择题
A. ARP
B. DMZ
C. VLAN
D. VPN
单项选择题 WhichofthefollowingexpansioncardsshouldbeinstalledintoaservertoprovideiSCSISAN connectivity？（）
单项选择题 Acompanybacksuptheirdatausingdaily，weekly，andmonthlytapebackups.Theweekly backupsarealsoknownaswhichofthefollowing？（）
单项选择题 WhichofthefollowingBESTdescribeshowservervirtualizationcancutdownITcosts？（）