I have a cable modem provided by the ISP, which also is a Wi-Fi access point, but the Wi-Fi signal doesn't reach a room located in another floor of my house.
I have a D-Link DIR-300 router and I wonder if is it possible to use it as a repeater of the AP to get a stronger wifi signal. If it is possible to do it, are there any good "how-to" tutorial freely available so I can get this setup working?