The DNS full form or full name of “Domain Name System”.:
Each domain name (eg web in youtoube.com) and internet connected device has a unique IP address (eg: 198154215 which shows which server's content is stored on which server.
Install a domain name server inside this system
It is, you can compare it with a phone book or telephone directory or contact list of your mobile where the name and its mobile number are written on one side, similarly the information of domain name and its ip address is also stored in the domain name server. She lives.
Now here comes a question that there are a lot of websites in the world, so will all these information be stored in one DNS system? No, it is really a difficult thing to do and it is not even right from safety point of view.
Just as the internet itself is spread all over the world, in the same way domain name servers are also numerous where DNS information is stored.
All these servers are connected to each other. If information is not found in one DNS, it automatically connects to other dns.
We should also be aware that it is not necessary that a domain has only one IP. Many domain names can be linked to more than one, sometimes hundreds of IP addresses.
History of DNS
Nearly 40 years ago, when the Internet was small in size, there were very few websites and devices whose IP address was easy for people to remember.
But as the size of the network increased and the number of websites increased, it became very difficult to remember the IP address of all of them.
To deal with this problem, in the 1980s, a computer scientist named Paul Mockapetris invented the domain name system to give the website a human readable name (some English names) that we humans are easy to remember.
Although you can still access a website through IP, but hardly you will know about the IP of a website, well… usually we do not even need it.
But still you must know how this DNS works, so that you can understand it well. So why should we know how DNS works...
How does DNS work?
When we enter the address of a website i.e. domain name like google.com in the address bar of the browser, the first task is to find the IP address of that domain, for this it is first checked the cache memory of the browser if you If you have visited Google's website, then its IP address can be stored in your browser's cache.
If the IP is found in the cache, it opens the website.
If the IP information is not stored in the browser cache, then it is the operating system of your system like Windows, Will transfer request to Android or Mac.
Your operating system sends this request to the resolver ie your Internet Service Provider (ISP) which also has a cache which can contain a record of IP address.
If IP is found here then this process ends
And IP information is given to the client and the website is accessed.
If IP is not found here as well, the request is transferred from the resolver and goes to the root server.
Root server t top level domain server? Rade performs information about servers of top-level domains such as .com, .org, .edu, .gov, .in. Here the appropriate top level domain server is contacted according to the domain of the website. For example, request will be sent to .com server for our website web in hindi.
After getting the information from the top level domain server, now finally the information of # authoritative name server actual name server is taken and from here the IP address of the domain is known.
When the IP address is found, it is sent to the client, so that the website can be accessed through it and the IP is also stored in the cache so that this process will not have to be done again the next time.
Here you saw that such a long process is followed to find an IP address, but the amazing thing is that all these steps are completed in a few milliseconds.
Conclusion
I hope you have liked my article What is DNS full form. It has always been my endeavor to provide complete information about DNS full form to the readers, so that they do not have to search in other sites or internet in the context of that article.
This will also save their time and they will also get all the information in one place. If you have any doubts about this article or you want that there should be some improvement in it, then for this you can write low comments.
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What is DNS, what is dns and how it works.
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