00306nam a2200133Ia 45000030006000000080041000060400015000471000023000622450039000852500010001242600009001345460012001430050017001550STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aBehrouz A Forouzan  aData communications and networking  aThird  c2004  aEnglish20220125170529.0