So welcome back, guys.
Next, we will going to discuss the top level domain name servers classification.
So you can see that in the DNS system, we have learned that there is a root DNS server which is at
the apex of the DNS tree.
Then the first level domain name servers are actually called top level domain name servers.
There are approximately around 1000 top level domain name servers, out of which I have shown you only
7 or 8 top level domain name servers.
Now, each of these top level domain name servers that you can see in the diagram are actually responsible
for the websites of particular type.
For example, let us take an example that you have a top level domain name server Edu.
So edu top level domain name server is responsible for educational websites.
For example.
W-w-w dot dot edu w-w-w dot Stanford, dot edu and harvard.edu.
So all educational websites such as these are recommended to be housed under Edu top level domain name
server.
So if tomorrow you launch a certain educational website so you are recommended to purchase the domain
name under Edu, top level domain name server, then the second top level domain name server and probably
the most common and the most famous one is the.
Com top level domain name server.
The com top level domain name server is responsible for commercial organization or commercial websites
around 90% or even more than 90% of the websites of the world are housed under.
Com top level domain name server.
So any websites which is of commercial purpose such as Microsoft.com, W-w-w-what, Google.com, Facebook.com
and many others are actually housed under.
Com top level domain name server.
So com top level domain is actually the most commonly used domain, and more than 90% of the websites
are housed under this top level domain name server.
That the next top level domain name server is actually in.
So in stands for India.
Likewise for other countries.
There are other top level domain name servers, and as per the name of the country, the first two letters
of the country represents the top level domain name server name.
So in this case, this top level domain name server is a country specific, top level domain server
for India.
And what type of websites is this?
Top level domain name server responsible.
This top level domain name server is responsible for the websites which actually show the country specific
information.
So in this case, the country is India.
So these are the websites which actually shows the public information regarding the country, India.
So such websites are unacademy dot n or cropping.co dot n.
ET cetera.
That is actually some special top level domain.
And we will take this top level domain separately in our course.
So for now, just understand that our top level domain name server is used for reverse DNS.
Now what exactly reverse DNS is that we will going to discuss later in this course.
So we delegate the discussion on Arpa top level domain name server to be discussed later in the course.
Then the next top level domain name server you can see is org.
So org is responsible for all the websites which belong to non-profit organizations.
For example W-w-w dot the Pirate Bay or Wikipedia.org.
So if tomorrow you launch any non-profit organization and if tomorrow you plan to launch a website for
your this organization, then you will have to buy the domain name under.
Org.
And then the next top level domain name server is actually net top level domain name server.
And this TLD server is responsible for the website, which are actually related to Internet technologies.
For example, W-w-w-what Juniper.
Net is a company which works in network technology.
Similarly.
Slideshare.net.
Speedtest.net.
Sourceforge.net.
So note that it is only a recommendation that depending on the type or the nature of business you are
in, you should purchase the domain name appropriately as per the business nature.
So if you are launching an educational website, then you should purchase the domain name under Edu
top level domain.
If you are launching any commercial website, then you should consider purchasing the domain name under.
Com.
Top level domain.
Right.
And if you are.
Considering to launch a website for your non-profit organization, then you should consider to purchase
a domain name under.
Org top level domain.
Right.
So this is just a recommendation.
It is not a hard and fast rule.
Depending on the type of website, you should consider purchasing the domain name under appropriate
top level domain.
So this is how top level domain name servers are classified.