Version 4 of the Internet Protocol
Also known as Internet Protocol version 4
19 statements · 5% with external sources · numbers in brackets are citations
9 identifiers linking IPv4 across the web's reference databases
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Internet Protocol version 4 (IPv4) is the first version of the Internet Protocol (IP) as a standalone specification. It is one of the core protocols of standards-based internetworking methods in the Internet and other packet-switched networks. IPv4 was the first version deployed for production on SATNET in 1982 and on the ARPANET in January 1983. It is still used to carry most Internet traffic today, even with the ongoing deployment of Internet Protocol version 6 (IPv6), its successor.