CRC

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> Cyclical Redundancy Check, I believe.  It generates a 'signature' for a chunk
> of data that can be used to easily check whether two large chunks of data are
> the same.

Hrm..  how accurate is it?  I would imagine that whever you take a large chunk 
of data and compress it into a tiny signature, it would be possible for two 
different sets of data, or more, to have the same signature.  I assume it's much 
faster than checking if the data itself is identical on both sides of the 
connection :)

Phantom