单项选择题
A. Prior to purchasing hardware
B. Before installation
C. When installing drivers
D. After installation
单项选择题 Whichofthefollowingdisasterrecoverysitesrequirespowerandcablingtoberunbeforeitcanbe used？（）
单项选择题 Whichofthefollowingtechnologiescanprovidegeographicallybasedloadbalancingwithhigh availabilitybetweentwowebserverswithstaticcontent？（）
单项选择题 Whenloadbalancingtrafficbetweentwowebservers，whichofthefollowingtechnologiesprovides theLOWESTcostsolution？（）