http://www.google.com/intl/en/ipv6/index.html http://www.google.com/intl/en/ipv6/statistics.html http://www.google.com/intl/en/ipv6/faq.html What are IPv4 and IPv6? IPv4 is the current version of the Internet Protocol, the identification system the Internet uses to send information between devices. This system assigns a series of four numbers (each ranging from 0 to 255) to each device. IPv4 only allows...