Short for Internet Protocol next generation, a version of the Internet Protocol (IP) reviewed in IETF standards committees to replace IP version 4. The official name of IPng is IPv6, where the v6 stands for version 6. The current version of IP is version 4, so it is sometimes referred to as IPv4.
IPv6 is designed as an evolutionary upgrade to the Internet Protocol and will, in fact, coexist with the older IPv4 for some time. IPv6 is designed to allow the Internet to grow steadily, both in terms of the number of hosts connected and the total amount of data traffic transmitted.
IP Next Generation Overview This papers provides a comprehensive overview of the IPng protocol and describes the work of IETF IPng working group. It was written by Robert M. Hinden, Director of Software at Ipsilon Networks.
IPng working group Provides information on the Next Generation Internet Protocol (IPng). Includes an overview, specifications, presentations, and working group activities and documentation.
Yahoo!'s IPv6 page Yahoo!'s directory of information and documentation for IPv6.
RFC 1752 Request for Comments document for the IP Next Generation Protocol.