Audio link two computers in real-time: ethernet?

["Buzap Buzap" <buzap@gmx.net>]

Hi folks

I was just wondering:
What's the best way to link two computers (mac or pc): One would get the 
original signal via Firewire, add some FX and pass it two the next.

Would this work with Ethernet (what protocol/concept? Rewire?)?
What's the best practice here to make this work in real-time?

best regards
Buzap

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