Welcome to the Treehouse Community

The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.

Digital Literacy How the Web Works The World Wide Web The Domain Name System

helmi al kindy
helmi al kindy
1,371 Points

Is there a particular reason as to why ...

We don't use the same DNS server ? And how is it that DNS server can not know a particular website, isn't it ICANN's job to make sure all websites are in the DNS ?

1 Answer

Patricia Snyder
Patricia Snyder
5,563 Points

Hi Helmi, The server we use is based 1st on our physical location. The server closest to us that may contain the information we need is accessed first. If that server doesn't have the information, the next server will be accessed. Luckily, there are thousands if not millions of DNS servers across the world, so there should always be one relatively close by.

Many servers have redundant information, but not all cary the same information as no one server could store all of the IP addresses, there are just too many of them. Also, from what I understand, servers specialize in top-level domains. That means that some servers only deal with .com, some deal with .net and some deal with .io.

For more information you can check out this website: https://technet.microsoft.com/en-us/magazine/2005.01.howitworksdns.aspx.

I hope this helps.

Trish

helmi al kindy
helmi al kindy
1,371 Points

Thanks for clarifying and for the link as well.