00476nam a2200193 a 450000500170000002000180001708200150003510000250005024500380007525000120011326000310012530000330015660000080018963000210019763000220021863000300024085600060027085600060027620251203114923.0  a9781259064753  a004.6bFOR  aForouzan, Behrouz A.  aData communication and networking  a5th ed.  aChennaibMcGraw Hillc2013  axxxviii, 1226 p.c24 cm.bPB  bc_  aComputer Science  aComputer networks  aData transmission systems  f_  a_