00273nam a2200109Ia 4500008004100000082001300041100002300054245003700077250001200114260002700126300001000153150201s2014    xx            000 0 und d  a4.6bSTA  aStallings, William  aData and computer communications  a9th Ed.  bPearsonaN.Delhic2014  a864p.