![](https://cos-cdn.shuashuati.com/pipixue-web/2020-1231-2005-12/ti_inject-812ce.png)
What is a benefit of Internet protocol (IP) telephony?()
A.
Synchronizes password exchanges for call setup
B.
Creates an encrypted tunnel for voice through a Transmission Control Protocol (TCP)/IP network
C.
Enables two-way voice transmission over a packet-switched TCP/IP network
D.
Eliminates the need for physical cabling in a TCP/IP network