3.4.  Token Ring (802.5)      225

   (Source Address, SA);

  (INFO);

   (Frame Check Sequence, FCS);

   (End Delimeter, ED);

   (Frame Status, FS).

         -
 ( -),    (LLC-). -
 Token Ring      -.  FC
   (MAC  LLC),      MAC,  
 ,        ,

      .

  ,    , ,   -
  ,      (Duplicate Address
Test, DAT).

    ,   ,  
        (Active
Monitor Present, AMP).

     (Standby Monitor Present, SMP) -
  ,    .

       (Claim Token, CT), 
,    ,    -
  ,       .

     (Beacon, BCN)    -
  ,    ,  , -
    ,    . , 
   ,   ( -
      Token Ring)  
.      BCN   , 
   BCN    (NAUN) .   
       BCN  ,  
    .   Token Ring  
 -   ,  Beacon- -
      .

   (Purge, PRG)      ,

           

  .

  802.5    ',    -
 802.3.         2,  6 .
        
  2-,    6- .    6- -
   ,     . ,  
 ,  .

       ,    . 
       .   