What kind of net connection should I have for a DataGuard system?

I want to construct a DataGuard system on 3 PCs( all with the RHEL5.0 OS and just for test purpose). But I don't know what kind of connection should I make between the 3 PCs? Shoud I use a router?
Thank you for any answer.

You don't really need a router for this testing.
a simple back to back connection would work.
or a hub even.
routers tend to get more expensive.
jason.
http://jarneil.wordpress.com

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