One of the fundamental design principles of today's Internet is so basic and so important that few users have ever heard its name; they just assume its existence. It's called "end-to-end," and some disturbing new developments are putting it in jeopardy. The end-to-end principle asserts that information pushed into one end of the Internet should come out the other without modification: the Net should act like a big, fat, dumb, digital pipe.

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