单项选择题
A. converging voice， video， and data onto one network
B. using IT services to improve revenue
C. minimizing the total cost of ownershippf the network
D. updating obsolete infrastructure
单项选择题 WhatisneededtoallowITmanagerstodesign，control，andmonitortheirwirelessnetworksformacentralizedlocationaswirelessnetworksgrowinscaleandcomplexity？（）
多项选择题 WhataretwoadvantagesthattheCisco3900SeriesIntegratedServicesRoutershaveovertherestoftheintegratedservicesrouters？（）
多项选择题 Anintegrated，convergednetworkenablescustomerstoaccomplishwhichthreeactions？（）