150                          _______________________ Internet

    

       . -
     :

  .      
.      -
,  ,     .  
    .

 .  .         
  (resolve)      -
  ,   ,    
   .      -
 .       -
      ,     -
.      :

1.      ,  -
   .

2.       .

  ,   ,  
     ,   -
  RR.   , ,   RR
    ,   ("")   
( 1).

1.       (  
).     ,  
 5,     2.

2.     QNAME.  ,   
 3,     4.

3.  ( )  .  ,
     :

   QNAME.      CNAME
(),  QTYPE    CNAME (   -
),    CNAME   , 
QNAME    CNAME     1.
,    RR,  QTYPE  -
      6.

         .  ,
     NS RR,   
  .   NS RR   
(authority)  ,    (additional)
      (
"" )     4.