单项选择题 Which Cisco collaboration product line will reduce TCO. Improve the user experience andproductivity, and increase business relevance?（）

单项选择题 Which cisco collaboration service will encourage true customer intimacy by quickly and proactively connecting people with the information, expertise and support that they need?（）

多项选择题 Which two Internet Protocol (IP) telephony devices are best categorized as infrastructurecomponents?（）