What is the full form of the acronym “VoIP”?

Concept

An acronym is expanded by matching its letters, in order, to the initial letters of the words in its established term.

In networking, voice can be digitized, divided into packets, and carried over networks that use the Internet Protocol.

Application

For VoIP, V represents Voice, “o” represents over, I represents Internet, and P represents Protocol.

Therefore, VoIP expands to Voice over Internet Protocol.

Contrast

• Voice over Internet Protocol preserves the established letter-to-word mapping and the networking meaning.

• Voice over Intranet Protocol changes I from Internet to Intranet, so it names a private-network variant rather than the established expansion.

• Vacuum over Internet Protocol changes V from Voice to Vacuum; vacuum is a physical condition rather than spoken audio.

• Vacuum over Intranet Protocol changes both V and I and does not denote the established networking term.

Thus, the full form is Voice over Internet Protocol.