DNS

In day today life most of the people use the Internet for browsing websites. Out of them many people don't know hoe exactly the background process takes place to let them browse the websites. We simply type the name in the address box of a browser and we hit on the enter key, then the browser will display the information stored in that website. But browsing a website is nothing but connecting to a computer and getting the information from it. But, well all knew that every computer is uniquely identified with a series of numbers (called as IP Address). Then how we are able to connect to another computer and get the information by simply typing the human readable website address in the browser but not the IP address.? There comes the service called as DNS. Usually stands for Domain Name System. In the other way we can call it as Name Address Resolution. Coz, it converts human readable names to computer readable numbers and vice verse.
For example, About 99 percent of people use google.com every day. we simply punch the google.com name in the address box and hit the return key and them the browser will takes us to the google.com page. But as soon as we hit the enter key the DNS service will comes into play and will convert google.com to IP address 209.85.153.104.

If you are a bit curious to know about IP addresses of the websites that you use daily, then go to command prompt and type ping followed by the website address. There is another way find it from your Mozilla FireFox browser. Download the Add-on ShowIP from addons.mozilla.com. After You install the add-on you can see the IP address of the website at the bottom right corner of your browser.

Still a lot more to learn about DNS !!.

Follow this link http://en.wikipedia.org/wiki/Domain_Name_System