00553cam a22001932  4500001001100000005001700011008004100028020001700069040001500086050002300101100003600124245005900160250001200219260003300231300001600264650004100280650003500321852000300356000002417820151021151151.0130617s         xx           000 0 eng d  a8131715369 :  aKABUcKABU 0aTK5105 b.S73 20071 aStallings, William.@000014822310aData and computer communications /cWilliam Stallings.  a8th ed.  aNew Delhi :bPearson,c2007.  axvi, 834 p. 0aData trasmission system.@0000148479 0aComputer networks.@00001482141