单项选择题
Which of the following server clusters offers increased availability， performance， and scalability？（）
A. Passive/active B. Active/passive C. Passive/passive D. Active/active
单项选择题 WhichofthefollowingBESTdescribesaNAS？（）
单项选择题 Whichofthefollowingreplicationmethodsprovidesadisasterrecoverysystemwithminimaldowntimetonormaloperations？（）
单项选择题 WhichofthefollowingstoragetechnologiesconnectsbyTCP/IPandisseparatefromthecompanys LAN？（）
