Internet Connection Sharing
It is possible to share a single, low-cost Internet connection with multiple PCs on your Local Area Network, and because virtually every modern LAN connection is based on Ethernet, it might seem obvious that you'll need an Ethernet hub or switch to get more Ethernet connectors. It's true that you'll need an Ethernet hub or an Ethernet Switch. It's also true that you can "daisy-chain" multiple Ethernet hubs or Ethernet switches to get even more Ethernet connectors as your local network expands. However, Ethernet technology isn't smart enough to share your Internet connection without help. You'll need a NAT router for that, and most modern NAT routers include an Ethernet Switch or a Wireless Access Point that acts a lot like an Ethernet hub.
A movie entitled "NAT Routers Part 2: Multiple PCs" has been completed to cover this subject, and a high-resolution version can be purchased by clicking RIGHT HERE. A free, advertising-sponsored, low-resolution version is available in 11 brief segments. Click here.