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The case for a free market in IPv4 addresses
Posted by: Jordi on Thursday, September 01, 2011 - 05:23 AM
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Officially, the world ran out of IPv4 addresses earlier this year, when a final batch of addresses was divided among the five Regional Internet Registries. The authorities hope that declaring the IPv4 cupboards bare will push expanding networks into making the leap to IPv6, which has a 128-bit address space that's unlikely to ever be exhausted.
Complete info at ars technica.