00351nam a2200121Ia 4500008004100000082001700041100001600058245004000074250000800114260004700122300000800169650005200177150614s9999    xx            000 0 und d  a004.6  FRE-C  aJOHN, FREER  aCOMPUTER COMMUNICATION AND NETWORKS  a1ED  bAffiliated East West Press New Delhic2004  a432  aCOMPUTER COMMUNICATION AND NETWORKS  JOHN FREER