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Notice the slash in "http://en.wikipedia.org/wiki/TCP/IP" How does it not misinterpret TCP as a subfolder?

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It has an .htaccess rule that spots the /wiki/ and interprets everything after that as a parameter to be passed to a PHP script, a bit like this:


Note that the slash gets converted to %2F.

This happens behind the scenes so you don't see the url being rewritten.

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