cache server (slave)

[ric.castellani at alice.it]

In this configuration:

options {
         forward only;
        forwarders { serverA ; } ;
 } ;

zone "example.com"{
        type slave;
        file "zone.db";
        masters{ serverA; };
};

1- If I query to this server "example.com"  (it's authoritative for this domain) , server retrieves info from its zone file (which has copied from master) or from its cache ?
2- if I query to this server external domain, it forward request to serverA ?
3- This server is only caching secondary server ?
4- If server A doesn't konw query answer, this server gets nxdomain ?


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