单项选择题
What voice endpoint is recommended for use with the Cisco Unified Communications 500 Series for small businesses？（）
A. IP7961 B. IP8961 C. SPA504 D. SPA9000
多项选择题 WhichtwooftheseCiscoCatalystaredistribution-areaswitches？（）
单项选择题 WhatbestdescribesthefeaturesoftheCisco850Seriesrouters？（）
多项选择题 WhataretwosecurityfeaturesoftheCiscoSecureRouter500Series？（）
