What is DNS? How Does DNS Work?

If you stumble upon on this article in the search for what is DNS? Then we have a simple guide for you. It is a system that you interact with on a daily basis, yet we don’t even know that we are using it.

DNS stands for Domain Name Server. In the most basic term, it is the name of directories that matches with numbers (IP Address) which computer use for communication. Think of it is like your smartphone contact app. When you have to call someone, you search their name and the number will be automatically dialed. In the world of the internet, the contact name is like the domain name and the number itself is the IP address.

Now this directory¬† themes is not saved on one Domain name server. It is a distributed network of chain stored all over the world. Even your personal computer has stored a lot of DNS in the local storage. This is a very helpful technique because the server won’t have to provide the same information over and over again. For example, if you use Facebook.com a lot, instead of retrieving the information again, your computer will store chunks of data in the hard drive. This improves your browsing experience and on the other side, reduces the delay of the DNS server.

How Does a Domain Name Server Works?

Internet is a giant world of Inter-connected devices. Each device is assigned a unique IP address which helps them easy to navigate on the internet. Now imagine if you enter a string number to visit a website: Suppose this address belongs to “Www.google.com”. Be your own judge, which method is helpful for you? It’s obvious that the Domain names are much easier for us to understand.

Domain names are alphabets that are introduced for the ease to remember. A Domain Name Server Works in the following way:

  1. You open your favorite browser and type a website name. DNS record will instantly check if the record is available in the local DNS cache or not. If found, it will skip the next step
  2. If the DNS cache is not found, the DNS record will send a query to the DNS server and ask for relevant information.
  3. If the information is available on the DNS server then it showcases the result. If not, it sends a request to “root nameserver”. Root nameserver is specialized name servers around the world that are responsible for keeping the DNS record and ensures that the system works smoothly.
  4. Now that the DNS records are located in the Root nameserver, it parses it to your computer. The browser then showcases the webpage of the specified URL

In all this, a DNS is like a center point that stores the IP address of the most recent or frequent webpages that you have visited.


We are sure by this point you have a clear understanding of What Domain Name Server is and how they work. Make sure to share this article with your friends so they can understand and increase their knowledge too.

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