310    4          ____

    .     -
            -
    ,   
  .      - -
       .

         - (Ethernet, Token Ring  . ),      
   .  LLC2,     ,    -
     .    LLC (  : 1,2
 3) ,       ,     
,       -.____ _____    __

       -
    .      -
,     ,     
         
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      .

      ,   
 ,       .    
      -
   ,      -
  .

         -
  Ethernet  Fast Ethernet   .  -
      
 ,   ,    
    .

  1997    IEEE 802.3x     -
   Ethernet.     -
  ,  ,     LLC2
 LAP-B.        
  ,    .  
  LLC2  ,       
  ,   4/5,     , 
   .     , -
  802.3x     ,
        
.

   ,    
      Gigabit Ethernet.  -
          
(1 488 090 /)       -
   ,        
   .  ,   
 ,     .     
      , 