00422    a2200157   4500020001800000082001500018100002300033245003700056250000900093260005200102300002300154650002200177650002100199650002000220650002400240  a9788120330788  a004.6bSTA  aStallings, William  aData and computer communications  a8th.  aNew  DelhibPrentice- Hall of Indiac2007g2007  axvii, 878p.c23cm.  aCOMPUTER NETWORKS  aCOMPUTER SCIENCE  aDATA PROCESSING  aDATA COMMUNICATIONS