DNS Communication

[Giuseppe Fuggiano]

Hi all.

Given two DNS servers, one master and one slave, I'd like to
understand what exactly happens when I update the database of the
first one.

What I know is that the first one, if properly configured, sends a
NOTIFY message to its slave and the slave replies.  What happens then?
 How the slave update its database?

Good links are also welcome.  Thanks.

-- 
Giuseppe Fuggiano