6.4.            545

  .        -
  ,   6    ,   ,  
    .     
32      4 ,    
  .     -
    64        
  .     
48-    10 %,    32- 
     16 %.

        
          , 
     .     
         
 ,    frame relay.    frame
relay        -
  (      frame relay    -
  ),     
  ,   ,  -
 4   ,     
     .

  (     service class) 
        .  -
  ,  , ,   ,  
  ,        -
  ,      , 
        ,  
        ,  , ,
       
   .     
        ,   , 
          .

   ,     
  ,    .  
          -
       (Constant Bit Rate, CBR)   
   (Variable Bit Rate, VBR),

     ,  , -
        
  .       -
  ,       
,         .
          -
      ,   -
       .

      ,  -
  :

     ,    CBR  VBR;