5.1.              347

. 5.1.   

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    . ,   ,   ,
    :   Ethernet, Fast Ethernet,
Token Ring, FDDI    frame relay, X.25, ISDN.    -
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    . 5.1. ,     -
         -
 .      .

     ,   
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     (Ethernet, Token Ring, FDDI, Fast
Ethernet  .)           -
,    (X.25, , frame relay),   -
   ^-/. -,     
 ,  .     -