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Two changes in the framework of IPv6 make it clear this is not your grandfathers IP. The change from 32-bits to 128-bits makes for an example on paper which is either in type so tiny you would have a difficult time reading it, or the example would have to break over the width of the paper. The difficulty of representing 128-bit addresses in the 1s and 0s that make them up at the lowest levels gives rise to the second huge change in IPv6.
Instead of using Base 10 (0-9) or what we call in the classroom, checkbook math, the new standard uses Base 16 or Hex math when writing IP addresses (0-F). If you have read our Success with: A+ Core Technologies book, you are comfortable with Hexadecimal math, and can continue. If you have not read that book, we have written a small segment and included it in Appendix B. Please stop here and go to that appendix to discover how counting to 16 in a single column of numbers works, then return to this section.
In IPv6 there are three conventional methods to represent IPv6 addresses as text strings. The preferred form is x:x:x:x:x:x:x:x, with each x being a one to four digit hexadecimal value of one of the eight 16-bit pieces of the address.
For example, one legal IPv6 address is::
Another example of a legal IPv6 address would be:
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