004.6
F727D
           Forouzan, Behrouz A.
               Data communications and networking \ Behrouz A. Forouzan; Sophia Chung Fegan - 3rd ed. (10th repr) - New Delhi : Tata McGraw-Hill, 2005.
               xxxiv, 973p.
                ISBN: 0-07-058408-7
                Subjects: COMPUTER NETWORKS; DATA TRANSMISSION SYSTEMS.