How a DNS Server (Domain Name System) works.

This is an animated DNS tutorial showing what a DNS server is and how it works. It explains the different levels of DNS, such as the resolver, root server, domain server, and authoritative name server.

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44 thoughts on “How a DNS Server (Domain Name System) works.

  1. @4:04 You mentioned TLD server stores address info for top level domains (.com as an example including ) but then you moved on to state that TLD wouldn't know and it will direct users to Name server.

    This is confusing me. So what if a TLD can't find a website '' which doesn't exist? I am guessing it skips Name server and just return an error code?

  2. Thank you very much for that perfect explanation. I have been looking for a clear explanation for the DNS system and unfortunately alot of the available videos on the internet made it more complicated than explained it clearly.
    Thank you for your great explanation again .

  3. Why keep Root Servers and TLD Servers when they don't know what is the domain name? Can't we make something that directly connects the Resolver Server to the Authorative Name Server?

  4. Do the browser automatically request resolver for ip of domain or i need to do it manually?
    why the resolver does too many steps to find the ip rather it can directly request to authoritative name server?

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