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IPv6, short for Internet Protocol Version 6, is the next generation
protocol designed by the IETF (Internet Engineering Task Force)
to replace the current version of Internet Protocol, Version
4 (IPv4). Most of today's Internet uses IPv4, which is now nearly
20 years old. IPv4 has been remarkably resilient in spite of
its age,unfortunately, there is a growing shortage of IPv4 addresses,
which are needed by all new machines and devices connecting
to the Internet. The IPv4 address exhaustion is predicted to
happen between year 2005 and 2011.
IPv6 comes along to fix a number of problems in IPv4 and to
add many improvements to cater for the future Internet. The
improvements came in areas such as routing, network auto-configuration,
security and mobility. IPv6 represents a big package of capabilities,
of which addressing is the most visible ingredient. The addressing
issue gets a lot of attention, but it is only one of many important
issues that IPv6 researchers have tackled.Among other capabilities
developed in direct response to critical business requirements
are scalable network architectures, improved security and data
integrity, integrated quality of service,automatic configuration,
mobile computing, data multicasting and more efficient network
route aggregation at the global backbone level. |
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