Thread: How DNS Work

How DNS Work

Domain Name System (DNS) is a naming system or a database for computers connected to Internet, it translates domain names example (http://www.indiabroadband.net) into a raw number called IP address, examaple (96.30.37.142).

For humans it is easy to remember names like indiabroadband.net, but its not same for computers, they use IP address as names to refer each other.

When we type www.indiabroadband.net into our browser address bar and hit enter the browser sends a request to DNS server asking for the IP address then the DNS will check its cache or database for the same and will locate the host where the web pages are located or stored and will inform the browser which will then load the web pages.

This searching or locating process is known as domain lookup, which is provided by every internet service provider.

When we enter a address in our browser and hit enter at left bottom of our browser we can see a set of messages being displayed "Looking for" and "waiting for". "Looking for" means that the browser hasn't found the IP address yet, and "waiting for" means it has found the IP address and a request has been sent but reply has not been received and when it receives the reply it starts to transfer data and the web page is loaded.

So DNS makes a lots of difference in how a web page loads, normally DNS provided by ISP's are poor in performance so its better to switch to other DNS providers who are reliable.

Few of the DNS Providers and their IP Address:

OpenDNS

208.67.222.222
208.67.220.220

Google

8.8.8.8
8.8.4.4

DNSResolvers.com

205.210.42.205
64.68.200.200

Comodo Secure DNS

156.154.70.22
156.154.71.22

Good one Deep. Worth a rep.

Can you post the most intresting part of what happens when a request hits the DNS server ?

Originally Posted by talktoanil

Can you post the most intresting part of what happens when a request hits the DNS server ?

I created the thread keeping in mind a newbie, and explained it in a layman's language so that they can get through it.

Refer this for DNS Resolution Process

Originally Posted by deepmohan

I created the thread keeping in mind a newbie, and explained it in a layman's language so that they can get through it.

Refer this for DNS Resolution Process

Yeah. Actually that was an hint to give you an head-start for next article.

Keep such simple yet good articles coming.

@talktoanil @meetdilip

Thanks for your support.