. , . . . .
(Asynchronous Transfer Mode - ) , .
().
(cell), . 53 (), 48 () 5 . , 5 , .
ATM -. , . , , .
, ATM, , . , , ATM, :
, , ;
;
: , , - , ..;
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ATM , VC (. Virtual Circuit), :
, PVC (Permanent Virtual Circuit), , ;
, SVC (Switched Virtual Circuit), .
, SPVC (Soft Permanent Virtual Circuit).
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Active Directory, , .
, , , , , . :
(public key) ;
;
;
;
(digital signature).
. . .