This is a user making a querry on localhost

   ----------------------------------------
   -         ...                          -
   -        .   .                         -
   -        . U .    ............         -
   -        .   .    .resolver  .         -
   -         ...     ............         -
   -                    .  ..  ....       -
   ----------------------------------------
                       .      .        ....
		       .       ..          ....
		    ......    ........ 	     ........
		    . Rx .    .   Rx . 	     . Rx   .
		    ......    ........ 	     ........
		      .	      ..       		 .
		      .	    ..	       		 .
		      .	  ..	       		 .
		      . ..	       		 .
		  ........	       		 .
		  .   Rx . 	       	      ..........
		  ........		      . Rx     .
		  	       	       	      ..........


KEY
----
U - USER
R - resolver
x - a zone file. resolvers hold knowledge about name servers in zone files