00331nam a2200133Ia 4500008004100000020001800041100002500059245003900084250001100123260002100134260000900155300000900164650002400173221231s9999    xx            000 0 und d  a0-07-063414-9  aForouzan, Behrouz A. 0aData Communications and Networking  a4th Ed  bTata McGraw-Hill  c2009  a1134  aInformation Science