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全部科目 > 软件认证工程师考试 > 思科认证考试 > CSE(646-205)

单项选择题

What is a benefit of Internet protocol (IP) telephony?()

A.Synchronizes password exchanges for call setup
B.Eliminates the need for physical cabling in a TCP/IP network
C.Enables two-way voice transmission over a packet-switched TCP/IP network
D.Creates an encrypted tunnel for voice through a Transmission Control Protocol (TCP)/IP network

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