单项选择题
If A customers needed to load-balance across multiple data center. which Cisco product would the customer consider?（）
A.ACE Global Site Selector B.Site Balancer C.ISR Wide Area Acceleration Server D.Nexus Site Balancer E.ASR Virtual Balanced Network
单项选择题 Is an open standard promotes interoperability among the wireless client adapters and dial-in servers from different vendors.（）
多项选择题 Internet Protocol videoconferencing (IP/VC) provides which two business benefits? （）
单项选择题 How does a switch respond when it receives a message?（）
