If you plan to connect to the Internet using DSL or a cable modem, you can use a router and ethernet hub to share your Internet connection.

In this configuration each computer in your office connects to your hub which is then connected to the cable modem. This gives each computer a direct connection to the Internet. Some cable modems now allow you to connect multiple PCs to them, potentially eliminating the need for a seperate hub or switch. If you are sharing files and/or printers between workstations you may want to consider adding a seperate Firewall.

The above diagram shows the setup of a medical office running a a hub and router LAN. In order to run a hub and router LAN you will need the following hardware.

Network Hardware
Several different pieces of network hardware are required to set up this type of LAN.

• DSL/Cable Modem - your DSL/Cable modem allows you to connect to your ISP and the Internet.
• Firewall -If you are sharing local files or printers you may want to buy a seperate firewall to ensure the security of your LAN. We recommend the Sonicwall SOHO 3($500).
  
• Network Hub - Hubs and switches are network devices that connect computers together in a network and help transfer data across the network. All these devices typically have at least one RJ-45 port to connect computers to (although most have anywhere from 5 to 24 ports).

Accessories
Several other items will be needed to network your computers.

• Ethernet Cable - Special cabling (technically called Category 5 UTP) is required to build an Ethernet network. One end of an RJ-45 cable plugs directly into a computer's Ethernet network card or adapter, and the other end plugs into a your hub.
• Wall Jacks - RJ - 45 wall receptacles allow you to plug your computer into your network.