Extensibility: Improved support for options / extensions.Enhanced support for multicast and QoS.

Streamlined header format and flow identification.

End-to-end security, with built-in, strong IP-layer encryption and authentication.

More efficient and robust mobility mechanisms.

Server-less autoconfiguration ('plug-n-play') and reconfiguration.

Ĭonsequently, the design of IPv6 was an opportunistic way to improve the Internet, with new benefits such as: There may be alternative technical solutions, such as NAT (Network Address Translation), but they won't work so easily to allow this growth. This, combined with new 'always-on' access technologies such as xDSL, cable, ethernet-to-the-home, were increasing the appetite for new devices and new users. This need arose from fast Internet growth: billions of new devices (cell phones, PDAs, appliances, cars, etc.), and billions of new users (China, India, Latin America). IPv6 was initially designed with a compelling reason in mind: the need for more IP addresses. IPv6 is the 'next generation' protocol designed by the IETF to replace the current version of Internet_Protocol, IP Version 4 or IPv4. IPv6 is short for 'Internet Protocol version 6'.

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