单项选择题 The cisco telepresence portfolio provides industry-leading video-conferencing solutions , how does the Cisco acquisition of tandberg strengthen its position？（）

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?（）

单项选择题 The ability to stack switches using cisco stackwise technology provides A number of important benefits to the customer, which of these is A benefit of cisco stackwise?（）