多项选择题
A.by enabling business to leverage investments in the network
B.by spending less time addressing attacks
C.by enforcing policy compliance
D.through admission control
多项选择题 Whicharethreechallengesandtrendsthataredrivingtheneedfortechnologyintheretailmarket？（）
单项选择题 Inwhichofthesephasesisacustomerscurrentnetworkinfrastructureassessed？（）
单项选择题 Anewclientofyoursisexperiencingagrowthspurt.TheclientsITstaffismakingnetworkchangesmanuallyand，asaconsequence，isextremelyoverworked，Yousuggesttheclientimplementanetworkmanagementsystem，citingwhichimportantbusinessbenefit？（）