Next-generation Internet addresses tested

A worldwide test was under way on Wednesday of the next generation of Internet addresses designed to replace the dwindling pool of 4.3 billion unique identifiers in the original system.

Internet body meets on domain names, IP addresses

ICANN, the international regulatory body for Web architecture, met here Monday to discuss expanding the list of top level domain names and a new generation of Internet protocol addresses.

IPv4

Internet Protocol version 4 (IPv4) is the fourth revision in the development of the Internet Protocol (IP) and the first version of the protocol to be widely deployed. Together with IPv6, it is at the core of standards-based internetworking methods of the Internet. IPv4 is still by far the most widely deployed Internet Layer protocol (As of 2011[update], IPv6 deployment is still in its infancy).

IPv4 is described in IETF publication RFC 791 (September 1981), replacing an earlier definition (RFC 760, January 1980).

IPv4 is a connectionless protocol for use on packet-switched Link Layer networks (e.g., Ethernet). It operates on a best effort delivery model, in that it does not guarantee delivery, nor does it assure proper sequencing or avoidance of duplicate delivery. These aspects, including data integrity, are addressed by an upper layer transport protocol , such as the Transmission Control Protocol (TCP).

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