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In the beginning of the 1990s, the IETF, the organisation that develops the Internet standards, started work on the successor of the Internet Protocol (IP). IP is the protocol that makes it possible for data packets to travel over the Internet from one attached computer to another. A decade later, the specifications for the new standard (named IP version 6, or IPv6) are almost, but still not quite, complete. The first commercial products and services based on IPv6 have just very recently been introduced into the market. In this pape