The difference of terms IP, VoIP and SIP. The difference in details.
In order to understand the features of the functioning of Internet telephony, it is necessary to familiarize yourself with the concept of the protocol.
The protocol is a set of rules and actions according to which data exchanged between many different devices.
IP (Internet Protocol) is the same internet working protocol that integrated individual computers into the worldwide Internet. The most famous set of protocols called TCP/IP (transmission control protocol/internet protocol).
VoIP (Voice over internet protocol) is a common name for a group of protocols that determine the order in which audio data transmitted over the Internet.
SIP (Session initiation protocol) is the most common IP telephony protocol, one of the underlying along with the popular H.323. Low requirements for connection speed needed, supports not only voice communication, but also video data transmission. Experts call SIP the most promising protocol for the further development of the Internet telephony industry.