What is DNS?  DNS stands for Domain Name System.  It is like a big phone book that allows your computer to look up the IP address of other computers (hosting servers for unique domain name, like Friendlynet.com).
    When you type the URL (Univeral Routing Locator) address, "www.google.com", into your web browser (within your computer), your ISP computer uses the Internet's DNS servers (called routers) to look up the IP address of the Google web site (Google's hosting server).
    Once the Google's IP addressed server is located, your web browser can contact the Google server and ask for their web page(s) to be passed through the Internet of "routers" to your "ISP server".
    Your personal computer's browser then collects the files, and presents the web pages you see.
    How the file content is transmited via the Internet DNS routers is a whole other story.