单项选择题
A global manufacturer of automobile parts wants to implement specialized voice applications to increase productivity and reduce the cost of overseas toll calls. Which Cisco solution best matches this business need?（）
A.Optical network B.Digital subscriber line (DSL) C.Internet Protocol (IP) telephony D.Wireless local-area network (WLAN)
单项选择题 Which Internet Protocol(IP) telephony element is best categorizedas a voice application component?（）
单项选择题 What feature does the Partner E-Learning Connection provide?（）
单项选择题 Which device is installed in user devices and makes wireless connections between them and a network?（）
