460     6   

         
           -
      .   
         (  
    ),    
        -
       
.

     ,    -
 .  . 6.2.      
:   ,  ,  R  -
 MUX,       
    ( ).     -
     ,      
DTE (Data Terminal Equipment).      -
    (    ),  
      DTE   -
  .

         
     ,      . ,
       (remote bridges),  -
 -      ,    
          .  -
    ,     , -
   ,     ,   
,     ,   -
  .      -
   -    (, IP  IPX) ,
        ,
 frame relay,      ,  
        .

 -^      
     .   -
       ,   -
,     ,    
         
  ,       ,     -
.      ,  
     ,  -
       .    -
        -,
  ,           
  ,        .
    ,    
    .    --
   .      
 ,      -
   ,  frame relay, ATM.