When you register for Internet access, you will only be able to use one IP address. This means that you only will be able to use one computer in your apartment. A broadband router offers the possibility to use several computers via a service called NAT (Network address translation).
Setting up your router
The broadband router's WAN / Internet interface should be configured with recieve an IP address automatically (DHCP). How you configure your router is specific to the model that you own. Follow the instructions manual that you recieved with your broadband router.
If you have misplaced the instructions for setup, you may be able to download these instructions from the manufacturer's web page.
Below you will find a guide outlining the steps required to connect your broadband router.