What is a DNS Server and How Does it Work?

Did you know that while being connected to facebook.com, you may see the web address in the browser, but in fact, you are not connected to Facebook’s real website? Now, you may be thinking how it is possible? To understand this, you’ll need to explore a bit about the term DNS. So, for that purpose, we’ve provided some information about DNS Server below:-What is a DNS Server and How Does it Work?

What is a DNS Server?

Domain Name Server primarily known as DNS is like a phone book for the internet. So, if you know a person’s name and want to know about his phone number, then you can do this with the help of a phone book. For instance, when you visit www.tricksprout.com in the browser, your computer resolve the human-readable hostname into the machine-readable hostname e.g. This process happens every time when you try to visit a new website, send e-mails or listen to your favorite radio stations.

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Why is DNS Important?

This question can be answered with the help of an example. For Example, When you enter the website name in a browser, all you have to remember is the URL like www.facebook.com and also that’s very easy to remember for the humans. But, is this can be same for the computers and networks?

No, Computers and devices can understand the IP address better as compared to the words. Therefore, DNS servers are important because we as humans can use the words to visit a particular website, but the computers need IP addresses to access a particular website. In Simple words, DNS is like a translator between the hostname and the IP address.

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How Does it Work?

Now, you might be thinking that how the DNS process works? How do computers use to read and convert the machine hostnames into humanly readable hostnames? So, we’ll take a look at the below procedure that the computers follow to convert the machine language into human language:-

Step 1: Request information

What is a DNS Server and How Does it Work?

The process begins when the user asks the computer to resolve a hostname i.e. www.viralhax.com. The first place where your computer look is its own local DNS Cache, which stores all the information that the computer has recently retrieved.

Step 2: Asks the Recursive DNS Server

What is a DNS Server and How Does it Work?If the computer doesn’t be able to find any information locally, then your computer queries the ISP’s DNS Servers. These are the specialized servers which perform a legwork of a DNS query on your behalf. The Recursive servers have their own caches so that the process ends here and the information will be returned to the user.

Step 3: Retrieve the Record

What is a DNS Server and How Does it Work?Now, the recursive servers retrieve the DNS from the authoritative nameservers and then stores the information in its local. If anyone else requests the host record for a particular website, then the recursive servers have the information and will not need to go through the lookup process again.

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Step 4: Receive the Answer

What is a DNS Server and How Does it Work?In this step, the recursive servers return back the record to your computer. Then, your computer stores the information in its local cache reads the IP address received from the record and deliver it to the browser. Now, the browser opens a connection to the web server and receives the website.


That’s it! The DNS entire process, from start to the finish only takes a few milliseconds to complete. I hope this post helped you to get the required information that you are looking for. If you like the post, then share this with your friends and other people who are looking for the same. Also, if you have any doubts, then don’t hesitate to share your doubts with us in the comment section below.

Jitender Singh

Jitender Singh, the owner of this site, is a technical expert, SEO expert, YouTubber and a experienced blogger by profession. He basically belongs to a middle class family in Faridabad.

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