Which of the following BEST describes VoIP $($Voice over Internet Protocol$)?$

answer

A series of protocols optimized for voice $($telephone calls$)$ and digital data transmission through a packet$-$switched IP network.

A protocol optimized for voice data transmission $($telephone calls$)$ through a $5$G switched IP network.

A protocol optimized for voice data transmission $($telephone calls$)$ through a packet$-$switched IP network.

A protocol optimized for voice data transmission $($telephone calls$)$ through a wireless network.