Do I need the Internet for iChat? Will it work with just an Ethernet LAN?

is it possible to run iChat between two computers without using Internet? rather simply over ethernet?
for example I have my webcam in one room and I am able to see it on another mac in another room, simply by an ethernet connection?
thanks

Use Bonjour on your home LAN.
Go to iChats prefs/accounts and enable Bonjour on all Mac's.

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