Transition from IPv4 to IPv6
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The Internet Protocol is the foundation of the TCP/IP protocol suite and the Internet, and thus somewhat comparable to the foundation of a house in terms of its structural importance. Given this, changing IP is somewhat analogous to making a substantial modification to the foundation of your house. Since IP is used to connect together many devices, it is in fact, like changing not just your house, but every house in the world!
How do you change the foundation of a house? Very carefully. The same caution is required with the implementation of IPv6. While to most people IPv6 is something new, the reality is that the planning and development of IPv6 has been underway for nearly a full decade, and if we were starting from scratch the protocol would have been ready for action years ago. However, there is a truly enormous installed base of IPv4 hardware and software. This means the folks who develop TCP/IP could not just flip a switch and have everyone move over to using IPv6. Instead, a transition from IPv4 to IPv6 had to be planned.
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Version 3.0 - Version Date: September 20, 2005
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