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Let us start with domain name service, so that is a DNS, so now what is a Denisova?



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A domain name service DNS server is one of the most important servers in your work and the Internet



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as well.



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Now why why it is so important because without a DNS, so you would have to type HTP, semicolon, slash,



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slash IP address instead of simply entering w w w dot Google dot com.



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So it allows that you can pretty much think of the DNS system as the phone book of the Internet.



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Right.



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It is better to remember the names than to remember IP addresses.



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So DNS server consists of a hostname that is a device which has an IP address and on the Internet it



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is a part of what is known as a fully qualified domain name F and so basically F.



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Q DNA is a combination of hostname and domain name, and the process of finding the IP address for any



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given host name is known as the name resolution process as a name suggests you give the name and the



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web server or the DNS server, specifically Willetton, the IP address that is associated with that



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name that is known as the name resolution.



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Now, the charge, the top level domains in use now on the Internet domains are arranged in a hierarchical



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tree structure.



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The following list includes some of the top level domains in current use.



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Dot com is a commercial organization, Amazon.com, Google, dot com, Microsoft dot com, Apple dot



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com, then dot edu is an education establishment such as a university, Stanford dot edu amitay dot



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edu, then California University dot edu.



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Dot Jehova, it is a branch of the U.S. government, but in your country specifically, let's consider



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the example of India from the riam w w w dot passport dot govi dot in you.



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You have seen that after Dot Jehovah, sometimes the initials of your country, which means that under



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dot government it is the domain is given for specificly for your country then is Dot Einaudi and international



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organizations such as NATO or United Nations.



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Dot net.



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Dot Net is a network organization and dot org is a non-profit organization.



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Now your local Internet service provider is probably a member of the dot net domain because the Internet



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service provider comes under the network organization and your company or let's say you are working



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and if you're looking at a company, then you come under the part of dot com.



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And if you are studying in the university and if your university has a website, the commander then



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education establishment in other parts of the world, the final part of the domain represents the country



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in which the server is located.



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For example, dot C for Canada, DOT JP for Japan, DOT UK for Great Britain and DOT.



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I am for India now.



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Well over 130 countries are represented on the Internet.



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But for most of the websites that you have seen on the Internet, the dot com domain is by far the largest,



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followed by the dot edu domain.



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So dot com is the largest domain, followed by the dot edu domain.



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So this is false.



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This is second and there are only one hundred and thirty countries throughout the globe that are so



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for example, w w w dot that say Google.



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D'Arte in.



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So what does this dot end means?



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What is this dot in means?



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It means that this server is located of the server of Google is located in India.



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So whenever someone from India accesses or tries to ask a query on Google, the request is forwarded



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to the server that is located in the Indian continent, Indian subcontinent.



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OK, now, in the next lecture will have an introduction to the different record types.



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And I'll tell you what a record means in the DNS server.