Network backbone

I have to develop a backbone to connect a network together. There are 5 networks currently at stand-alone. Can you help me find this on the Internet?
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recommend using TCP/IP. Buy 5 network cards and put all the computers on a private subnet (I.E 192.168.1.1 ? 192.168.1.5.) You can then connect them all via a hub or switch and have a networked environment.

This was first published in September 2002