358  5        _____

. 5.3.   

 

   ,    ,   ,
     ,  
  ,    , 
  .      -
    ,  -
        . 
        -
     , Ethernet, Token Ring, FDDI.
         -
    ,     
    . ,  
   V.35,      -
 : LAP-B (   .25), LAP-F ( 
 frame relay), LAP-D (   ISDN).   -
      ,   -
       ,  
,  ,    ,   
         