 . 24.4 ,       -
       DNS,   . 24.3. -
       DNS-. 
          -
 ,    ,     .
         ,   
        
corn.    ().

 ~ 301-	- "-	1.   ftp.stol .example.com.?^	 DN 	 S- 	2.    ^		 DNS-   corn   example   site1
					ftp.site1.example.com.? ' ^ 3. ,   	0	
					^  DNS- 1. 4.    ^		
							
							
					ftp.site1.example.com.'.' ^ 5. ,   	 	
					^  DNS- 2. 6.    ^		
	=				 	- J		~~~~	
							ftp.site1.example.com.'' ^ ^ 7. ,   	 	
							 DNS- 3.		
									
			^"10. , 				ftp.site1.example.com.? ^		
			1		9. , .		

. 24.4.  ,    -
   



    DNS-:  (), 
()  :

         
    ,     .
          
,   .   -
         -
 .   ,   , 
 DoS- (. ),  ,   -
 .

  ,    ,  -
,          -
  .   ,    -
   ,     
 .      ,
         , 
  (zone transfer).

  DNS,    ,  . 
    (),    .  

724  V.     