Crash course in networking;
Each computer requires the hardware to connect, so you'll need a Network Interface Card (NIC) for each computer.
Then you need some wire to connect the cards. Ethernet with RJ45 jacks are most common. For 2 PCs, a single crossover cable will suffice, but for 3 PCs, you'll also need a hub. These days, switching hubs are almost the same price as non-switching hubs, so get one of these.
Make sure the NICs and Switch are 100Mb/sec Full Duplex. I'll go into more detail if you like
Hardware sorted, all you need now is to install the software driver. If you bought 3Com or Intel NICs, a generic driver will be installed by your Operating System - in all likelihood.
Last, but by no means least is the protocol. You'll already have TCP/IP installed for your modem, and this is what I use on my home network. You may choose to use NetBEUI, if all your systems are Windows-based, since it is much simpler; you just install it and it works.
TCP/IP, however, is more complex and requires further explanation (I'm not going to go into what it is or how it works, just the basics you need to get started);
[TCP/IP]
It's relatively straightforward to configure TCP/IP for a home network; simply choose 3 IP addresses from the range 192.168.1.x (where x is any number from 0 - 255). Out of habit, I leave 1 (gateway) - 10 alone. NEVER use 0 (network), 127 (loopback) or 255 (broadcast). For subnet mask, simply use 255.255.255.0. There are other private IP ranges, but you can look them up if you're interested
Since you are not connected up to a network which has Name Resolution servers, you may need a secondary method of resolving computer names on your home network.
This is what the lmhosts file does. You will have a copy called lmhosts.sam in your windows folder. Simply open this and save it as lmhosts, then add lines such as
MyComp1 192.168.1.11
MyComp2 192.168.1.12
MyComp3 192.168.1.13
Do this on each PC, and File sharing and LAN gaming will work a treat. You can also share printers.
/[TCP/IP]
Next step is to enable Internet Connection Sharing (ICS). You only need one modem on one computer to do this.
That's it!
OK, OK, it's not that straightforward, but neither is building a PC, right? These are the fundamentals, and as long as you have these, everything else is down to your configuration.
Hope this is helpful CitrixEngineer@yahoo.co.uk