单选题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 Digital subscriber line (DSL)B Opt
题目
单选题
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
Digital subscriber line (DSL)
B
Optical network
C
Wireless local-area network (WLAN)
D
Internet Protocol (IP) telephony