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In the future, there will be another problem with the internet come 2011, the lack of IPv4 addresses. IPv4 addresses uses 4 groups of 3 digits (e.g. 192.168.1.1) which allows up to 4,294,967,296 possible addresses which someday can be all used up. The transition to IPv6 addresses allows more possible addresses with more groups and the use of hexadecimals, meaning letters can now be used in the addresses. Each group can have up to 4 hexadecimals. IPv6 also have newer technical features than IPv4. IPv6 is supported in the most recent OSes (e.g.: Mac OS X, Vista, Linux)
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