单项选择题
A. Defrag
B. IPCONFIG /release
C. Firmware update
D. Baseline
单项选择题 WhichofthefollowingwouldprovidetheBESTreferenceofnormalserverperformancefora company’senvironment？（）
单项选择题 WhichofthefollowingexpansioncardswouldbenecessarytoincreasefaulttoleranceinaVoIP server？（）
单项选择题 WhichofthefollowingkeystrokesallowsinstallationofthirdpartystoragedriversduringaWindows set-up？（）