Question

Which of the following allows the transmission of voice and often video communication over the internet?

Answer 1

Voice Over IP (VOIP) is the option that allows the transmission of voice and often video communication over the Internet.
So, this doesn't refer to mobile or other telephone communication, but rather to the Internet solely. Applications that are examples of this type of technology are Skype, Teamspeak, Ventrilo, and others. This technology is becoming better and better with each day and will probably replace phones completely in the future.