zone "zone.com" {
    type slave;
    file "path/to/db.zone";
    masters {ip.add.ress.here};
};
zone "cnn.com" {
    type slave;
    file "path/to/db.zone";
    masters { cnn.add.ress.here };
};
zone "perlmonks.org" {
    type slave;
    file "path/to/db.zone";
    masters { 
    	ip.perlmonks.ress.here 
    		};
};