2013-05-26, 05:03 PM
There are 13 root DNS servers. These servers are the ultimate authority on mapping names to addresses. If a DNS request cannot be resolved from cache, it will hit the root servers which will be able to give a definitive answer.
You can't just tell your ISP that you have control over a domain. Only the root servers are trusted with that authority. Also, if you have control over a domain, you are trusted with information about subdomains.
Domain name registrars talk to the root name servers.
It's been a while since I learned this kind of stuff but I think I got the gist of it right. A good networking book will be able to help explain DNS.
You can't just tell your ISP that you have control over a domain. Only the root servers are trusted with that authority. Also, if you have control over a domain, you are trusted with information about subdomains.
Domain name registrars talk to the root name servers.
It's been a while since I learned this kind of stuff but I think I got the gist of it right. A good networking book will be able to help explain DNS.