00531nam a2200193 a 450000500170000002000180001708200150003510000280005024500410007825000120011926000310013130000300016250000640019250000260025660000080028263000350029085600060032585600060033120251203114834.0  a9781259064753  a004.6bFOR  aForouzan, Behrouz A.d_  aData communication and networkingb_  a5th ed.  aChennaibMcGraw Hillc2013  axxxviii, 1226p.c24cmbPB  aIncludes bibliographical references  glossaries and indexes  aTwelfth  reprint 2017  bc_  aData communication, Networking  f_  a_