00558nam a22001817a 450000500170000001000150001702000260003203500130005803700130007108200100008410000200009424500680011425000110018226000340019327000720022730000270029950000500032620140925112648.0  aENG-110926  a9788120349070c395.00  aEN-94458  bDBAD/PUB  a004.6  aBrijendra Singh  aData communications and computer networks /cby Brijendra Singh  a4th ed  aNew DelhibPHI Learningc2014  aRimjhim House, 111, Patparganj Industrial EstatebNew Delhie110092  axvii,482p. c24cm(pbk)  aIncludes bibliographical references and index