Forouzan, Behrouz A. Data communications and networking / Behrouz A. Forouzan and Sophia Chung Fegan - 4th ed. - New Delhi : Tata McGraw-Hill, c2007. - xxxiv, 1134 p. ; ill. ; 24 cm. - McGraw-Hill Forouzan networking series . ISBN: 0070634149 LCCN: Subjects--Topical Terms: Data transmission systemsComputer networks LC Class. No.: TK5105 / .F6617 2007