>Server with 3NIC to 3HUB or
>Server with one NIC to SWITCH and to 3HUB
>
>SERVER
> NIC1------HUB1
> NIC2------HUB2
> NIC4------HUB3
>
>or
>SERVER
> NIC------SWITCH----------HUB1
> |_________HUB2
> |_________HUB3
>
>
>Wich system is get better and faster communication!
>Thanx

I've never encountered a situtation like that, but I'll give it a wild guess:

Since the Linux kernel will fork threads to handle multiple connections, the first configuration would be faster because each card would handle less traffic that the second configuration in which one card would handle all the traffic. This assumes, of course, that the traffic is somewhat balanced and not concentrated through one hub.

Have you experimented with this?
Did I pass? :)