6.1.         467

                                 

Frame Relay       64 /                         ,

 2 /                                     
,  
 
 


SMDS            1,544-45 /          ,          ,
, ,          
                 ,

.   

             1,544-155 /         ,         , 
, ,         
                 1996 , 

  
  


TCP/IP          1,2-2,048 /          ,          
          

   Internet,
  

__________________________      _____   

   TCP/IP       5.
           -
   .   ,  SMDS,
    ,   
      .

 SMDS (Switched Multi-megabit Data Service)   
       ,   -
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    45 /    -  
  53 , ,     , 
  48 .  SMDS    IEEE 802.6, 
     ,  SMDS.  SMDS
  Bellcore,     .  SMDS
      ,     
   .   SMDS  -
 ,     ,   -
   SMDS   .

    

   ,    -
 ,    :

  ;

  .

   (backbone wide-area networks) -
        ,
   .  -