how DNS client perform reverse lookup
ngkeith at triumf.ca
Tue Jan 25 15:44:27 UTC 2005
Barry Margolin wrote:
> In article <ct3ioj$1qll$1 at sf1.isc.org>, Keith Ng <ngkeith at triumf.ca>
>>Would someone tell me how DNS client perform reverse lookup? Is there
>>any root servers like forwards lookup for the in-addr.apra domain?
> They start from the normal root servers. These servers have delegation
> records for in-addr.arpa, just like they do for com, net, etc. The
> client servers follow this reverse delegation in exactly the same way
> that they follow forward delegations. As far as the nameservers are
> concerned, there's no difference between forward and reverse DNS;
> everything is just arbitrary labels to the servers and resolvers.
I did not realize that the root servers for TLD are also responsible for
the in-addr.arpa domain.
Now it is making sense to me.
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