00569pamaa2200181 4500 0000012450 20100610090000.0 0256230447 004.6 FOR TK5105 FOR 1998 Forouzan Introduction to data communications and networking Behrouz Forouzan, Catherine Coombs and Sophia Chung Fegan. Massachusetts: WCB McGraw Hill, 1998. xix, 714p.: 24cm. Computer networks Data transmission systems COOMBS, Catherine FEGAN, Sophia Chung