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、Digital subscriber line (DSL)
- B、Optical network
- C、Wireless local-area network (WLAN)
- D、Internet Protocol (IP) telephony
正确答案:D
答案解析:有
微信扫一扫手机做题