What Do I Need to Have in Order to Share a Broadband Connection?
Before you get to the nitty-gritty details of sharing a broadband connection, you need some preparation. There are some items you need to have before you start.
Obviously the first thing you need in order to share a broadband connection is the broadband connection itself – LAN, ADSL, DSL, or cable. You also need to check your contract with your provider because there are providers, who explicitly ban you from sharing your broadband connection. Some idea about how Ethernet works won't harm you but for now you can do without it.
Next, if you will be sharing the broadband connection between two computers only, you need a crossover cable to connect them. Additionally, each of the computers must have a network adapter.
If you plan to connect 3 or more computers, you won't be able to connect them to each other directly – you will need a switch or a hub. Also, you will need an Ethernet cable from the hub/switch to each of the computers and of course, a network adapter for each of the computers.
If you plan to use a router, you need to get one. Very often a switch/hub is included in the router (and very often the router is also the modem), which means that you won't have to get each of these devices separately.