What is DNS? And How it works

 DNS stands for “Domain Name System”. It’s a system that helps you to connect with websites by matching human-readable domain names (like therkprogrammer.blogspot.com) with the distinctive ID of the server  wherever an internet site is hold on.

Think of the DNS system because the internet’s phone book. It lists domain names with their corresponding identifiers referred to as information processing addresses, rather than listing people’s names with their phone numbers. once a user enters a website name like therkprogrammer.blogspot.com on their device, it's up the information processing address and connects them to the physical location wherever that web site is hold on.

How will DNS work?

The Internet could be a large network of computers. every device connected to the net is assigned  a singular IP address that helps alternative computers determine it.

This IP address could be a string of dotted numbers that appear as if this: 192.124.249.166

Now imagine if you had to recollect such long strings of numbers to go to your favorite websites. they're troublesome to recollect and don't tell you something concerning the web site that you simply can see if you enter them during a browser.

Domain names were fictional to unravel this downside by victimisation alphabets and permitting users to pick out simple to recollect names for his or her websites.

The name System or DNS essentially interprets those domain names into IP addresses and points your device within the correct direction.

A domain name and its matching IP address is termed a "DNS record."

Here could be a straightforward thanks to perceive however DNS works in four steps.

Suppose you wish to go to our web site at World Wide Web.therkprogrammer.blogspot.com

1. Open your browser and kind World Wide Web.therkprogrammer.blogspot.com within the address bar and press Enter on the keyboard. there's at once a fast check to envision if you have got visited our web site before.

If the DNS records square measure in your computer's DNS cache, then the remainder of the DNS operation is skipped and you'll be directed on to World Wide Web.therkprogrammer.blogspot.com

2. If no DNS records square measure found, a question is distributed to your native DNS server. Generally, is commonly|this can be} your ISP's server and is often known as the "resolution name server."

3. If the records don't seem to be cached on the name server being resolved, the request is forwarded to what's known as a "root name server" to find the DNS records. Root name servers square measure selected servers round the world that square measure answerable for storing DNS information and keeping the system running swimmingly. Once the DNS record is found on the basis nameserver, your pc caches it.

4. currently that the DNS records square measure found, a association to the server wherever the web site is keep can open and World Wide Web.therkprogrammer.blogspot.com can show on your screen.