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Byline: MIKE ANGELL
The really big "upgrade" taking place in the computer world today isn't a move to Windows XP or the Pentium 4. That's nothing compared with what's happening with Internet user identification.
Internet protocol is the code, or transmission rules, or language that lets computers and machines talk to one another. The Internet now uses Internet Protocol version 4. But gear makers are starting to make routers and other products that use Internet Protocol version 6, or IPv6. (IPv5 apparently never made it out of early development.)
The big part of IP is the address. Every server, PC or anything connected to the Net needs a unique address. Otherwise traffic would be routed to the wrong sites. Machines and Internet service providers have these addresses. Users get one when they first get Net access, though most people don't know or care about their IP address.
IPv4 addresses are combinations of 32 ones and zeroes. About 4.3 billion such combinations are possible. Yes, that leaves room to grow. But somewhere down the line -- and maybe not all that far -- things could get touchy.
Hence, since 1994 groups such as the Internet Engineering Task Force have been developing ...