DNS for your knowledge is Domain Name System
Take a look at this definition and example at http://www.bleepingcomputer.com/glossary/definition31.html
Ive never used a Belkin Router or a wireless adapter through a USB Port, I'm more of a Linksys Router user and a wireless network card.
Did your router come with any drivers and did you install them or just plug everything in??
Knowing the steps that you have already taken to get where you are will help troubleshoot your issue