546     6   

         -
;

  ,      ,   
     (    -
 ).
       . 6.4.

 6.4.   
       

                       Constant Bit Rate, CBR.

    

  .

  .

:  ,   

                      Variable Bit Rate, VBR.

    

  .

  .

:  ,  

                       Variable Bit Rate, VBR.

He     

  .

  .

:   ,     

    : frame relay, X.25, LLC2, TCP

D                       Variable Bit Rate, VBR.

He       

.

  .

:   ,      

    (IP, Ethernet, DNS, SNMP)

X   _     ___      ____________

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

       -
 :

 Peak Cell Rate (PCR)     ;

 Sustained Cell Rate (SCR)     ;

 Minimum Cell Rate (MCR)     ;

 Maximum Burst Size (MBS)    ;