单项选择题
Which companion switch is recommended to be installed with Cisco Smart Business Communications System？（）
A. C2950
B. C3750
C. ESW 500
D. SRW224G4
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相关考题
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多项选择题
CiscoCatalyst4500Seriesswitchesareattractivetomedium-sizecampuseswithgrowthopportunitiesduetotheswitchesenhancedsecurityandwhichtwootherfeatures？（）
A. enhanced multilayer software image
B. connectivity to multiple types of WAN connections
C. Cisco Unified Communications Manager
D. QoS for converged networks
E. modular， customizable components
