Network works in Knoppix- but how?

My network seems to work fine with Knoppix, but not with Fedora Core 3. I'm trying to figure out why.

lsmod shows no ethernet module; modconf -c shows

Code:

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alias eth0 off

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ifconfig shows eth0 as running and I am able to access the internet. How can I find out how Knoppix is doing this so I can set it up under Fedora Core?

Thanks.