 3.       DNS____________145

 . TCP , ,    -
   ,      -
    .

      ,  
    ,      -
   .

      . 
  ,     ,
     (opcode),  ,    .,
      RR,   
    (. 3.13).

Header
Query
Answer
Authority
Additional

. 3.13.

  DNS-

 (Header).   .

 (Query).      .

 (Answer).  RR   .

 (Authority).  RR,     -
   RR  .

  (Additional).   .
 . 3.14     DNS-.

                        8                      15

ID	
QR	OPCODE	AA	TC	RD	RA	Z	RCODE
QDCOUNT	
ANCOUNT
NSCOUNT
ARCOUNT

. 3.14.    DNS-

