What technology enables voice communications via the Internet?

Voice over Internet Protocol (VoIP) is the technology that allows users to make voice communications over the Internet rather than through traditional telephony systems. It works by converting voice into data packets that are transmitted over IP networks, making it possible to facilitate phone calls via the Internet. This allows for features such as video calling, voice conferencing, and lower calling costs, especially for long-distance communication.

In contrast, text messaging services are designed exclusively for sending written messages, while traditional landline telephony relies on circuit-switched networks, which are not internet-based. Mobile phone networks offer voice communications but are based on cellular technology rather than Internet protocol. Thus, VoIP clearly stands out as the most relevant choice for voice communication over the Internet.