Let us assume that the client computer is connected to the Internet. The viewer typed an URL in the address bar of the browser say FireFox web browser and pressed Enter. This means the client/viewer requests a web page from a website. Then a message is sent to the name server. A name server maps a human recognisable identifier to system-internal identification. Name server finds out the server that hosts the requested web page by solving domain name and directs the client to that server.

Now a days most of the pages are scripted (php, asp and so on). Let us assume the page is in php script. Then the php page is interpreted to html and send back to the client browser. And the client see the desired page.