IPV4: Internet Protocol Version 4

Internet Protocol version 4 (IPv4) is the fourth version in the development of the Internet Protocol (IP) and the first version of the protocol to be widely deployed. IPv4 is described in IETF publication RFC 791 (September 1981), replacing an earlier definition (RFC 760, January 1980).
This tutorial will help you in understanding IPv4 and its associated terminologies along with appropriate references and examples.