stupid web question

[VB]

> YOU need a DNS server to be the AUTHORITATIVE server for your IP address.  YOUR
> DNS server will tell all the other DNS servers what IP address to translate your
> domain name to and they will only trust the authoritative server when updating. 
> Even if you setup Bind on your Esmith box, it still has to be added to the
> registrar as an authoritative server (IIRC).

Is there a nice document on the Internet that explains how these niceties of 
DNS work?  One that explains MX and Authoritative and trust?

Eric