4.2.          275

4.2.2. 

    

        -
,        (concentra-
tor),  (hub),  (repeator).      
         -
 .        
     (    Ethernet),   
 ,    ,  
.

    ,     -
         -
.        
 ,         
     Ethernet, Token Ring  . .  
        ,  
       Ethernet; Token Ring;

FDDI  lOOVG-AnyLAN.      ,
   ,    
      , ,  
Token Ring   MSAU.

     , -
     ,   . 
       ,   -
       -
,   ,      . .

       -
  ,       ,
  . ,  Token Ring  -
         -
 ,        . 
      , -
    .

       -
  Ethernet.

  Ethernet ,    -
      ,  
         
    ,      .   
      , -
    ,      
 .

   lOBase-T      -
   Ethernet,         -