Hello, vamos por partes. First thing you need to buy a router, so you can route your connection through your home. Aconselhor buy you a 5dBi more. Yes, the router must be at a distance of at least 1 meter from the floor, and somewhere to get a greater number of stitches.

You connect your ADSL modem into the router so that it can route your connection. To connect your desktop computer you need to connect the network cable from your computer to the router. Through the antenna, the router will transmit the signal of your internet, you can `get 'with devices that have Wi-Fi

The router comes with an IP number for you to configure it. To access it you type the IP number in Internet Explorer and soon after entering the password and user name that will also written on the router. Within the router settings you can configure a name for your network and security settings, for example putting a password to access your connection. (This is very important)

The settings are simple and very quickly you learn to do them. In a matter of cables, you only need to connect your router to your ADSL modem. And if you use a desktop, plug the cable into the router.

After doing this, simply enter the password to your connection for those wishing to enter it and you're done, use the Internet from anywhere in your home

via What do I need to set up a network at home? .