question about resolution

[Barry Margolin]

In article <d6vprv$1g7l$1 at sf1.isc.org>, "Chris" <sdqfsd at qdvqsd.cv> 
wrote:

> How does the local name server passe the query to one of the DNS root
> servers? I know there is a file "cache.dns" but where come that information

It's posted on well-known FTP sites, and usually included with BIND 
distributions.

> from, and, suppose the IP of one of those root servers changes, how can the
> local name server be awared of it?

When BIND starts up, one of the first things it does is send a query to 
one of the servers in the root hints file, asking for the current list 
of root servers.  If the address of a root server changes, they just 
have to be careful not to give the old address to someone running a 
bogus nameserver.

-- 
Barry Margolin, barmar at alum.mit.edu
Arlington, MA
*** PLEASE post questions in newsgroups, not directly to me ***