Let us start with domain name service, so that is a DNS, so now what is a Denisova?
A domain name service DNS server is one of the most important servers in your work and the Internet
as well.
Now why why it is so important because without a DNS, so you would have to type HTP, semicolon, slash,
slash IP address instead of simply entering w w w dot Google dot com.
So it allows that you can pretty much think of the DNS system as the phone book of the Internet.
Right.
It is better to remember the names than to remember IP addresses.
So DNS server consists of a hostname that is a device which has an IP address and on the Internet it
is a part of what is known as a fully qualified domain name F and so basically F.
Q DNA is a combination of hostname and domain name, and the process of finding the IP address for any
given host name is known as the name resolution process as a name suggests you give the name and the
web server or the DNS server, specifically Willetton, the IP address that is associated with that
name that is known as the name resolution.
Now, the charge, the top level domains in use now on the Internet domains are arranged in a hierarchical
tree structure.
The following list includes some of the top level domains in current use.
Dot com is a commercial organization, Amazon.com, Google, dot com, Microsoft dot com, Apple dot
com, then dot edu is an education establishment such as a university, Stanford dot edu amitay dot
edu, then California University dot edu.
Dot Jehova, it is a branch of the U.S. government, but in your country specifically, let's consider
the example of India from the riam w w w dot passport dot govi dot in you.
You have seen that after Dot Jehovah, sometimes the initials of your country, which means that under
dot government it is the domain is given for specificly for your country then is Dot Einaudi and international
organizations such as NATO or United Nations.
Dot net.
Dot Net is a network organization and dot org is a non-profit organization.
Now your local Internet service provider is probably a member of the dot net domain because the Internet
service provider comes under the network organization and your company or let's say you are working
and if you're looking at a company, then you come under the part of dot com.
And if you are studying in the university and if your university has a website, the commander then
education establishment in other parts of the world, the final part of the domain represents the country
in which the server is located.
For example, dot C for Canada, DOT JP for Japan, DOT UK for Great Britain and DOT.
I am for India now.
Well over 130 countries are represented on the Internet.
But for most of the websites that you have seen on the Internet, the dot com domain is by far the largest,
followed by the dot edu domain.
So dot com is the largest domain, followed by the dot edu domain.
So this is false.
This is second and there are only one hundred and thirty countries throughout the globe that are so
for example, w w w dot that say Google.
D'Arte in.
So what does this dot end means?
What is this dot in means?
It means that this server is located of the server of Google is located in India.
So whenever someone from India accesses or tries to ask a query on Google, the request is forwarded
to the server that is located in the Indian continent, Indian subcontinent.
OK, now, in the next lecture will have an introduction to the different record types.
And I'll tell you what a record means in the DNS server.