In Pictures: IPv6 by the numbers

Lee Schlesinger

IPv4 was developed back in the Dark Ages of the Internet – 1978. The 32-bit address space allowed for 4 billion addresses, which seemed like a good idea at the time. In 1993, IETF forecasts showed IPv4 addresses running out sometime between 2010 and 2017, so engineers began work on IPv6, which was completed in 1999.

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