28_________________________________________ Internet

        -
  .  TCP/IP   -
    .

   IP- ( D)

 IP-        -
 IP-,    . ,  , Q  R -
     X.   ,   -
    (, Q  R),      X.

    D      224.0.0.1
 239.255.255.244.       -
,   IP-,   .

  )

 224.0.0.1     ,    IP-
     .     
     RFC-1700.

 ,        D  
 ,     multicast-.

       
 IP-. ,  IP-    
   ,   multicast-IP- 
       
 IP-.   multicast-    IP-
  , ,    , 
 ,     -
 .

       multicast-
 . Multicast-   , . .  
multicast-        . 
   multicast-  , . .   -
    multicast-   . Multicast-
        
 multicast-.       
multicast- .

Multicast-       . -
 multicast-   IP-,   -
   multicast-   . IP-,   -
    multicast-, 
  multicast-.  multicast-
    ,       .