____________4.3.             295

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

     ,    -
   ,   .

   -      ,
      .    -
    (flood).      
      ,  
.        ,  -
     .   -
 ,    -     
          -
        -
     .      
   ,    .  
   (broadcast storm).

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

 . 4.19    .     
      MAC,   -
  .

 . 4.20        
   System 3000  SynOptics ( -
   ,          
  Ethernet   ,  
  ,       
 ).     ,    
    .

      (Forwarding Table) ,  
     LAN   LAN .   LAN  , 
 , 3 ,    LAN   2 .  , -