Shay, William A. <br/><br/>
Understanding data communications and networks / 
William A. Shay 
 - 2nd ed. 
 - Pacific Grove, Calif. :  PWS,  c1999 
 - 711 p. :  ill. 
<br/><br/>Includes bibliographical reference and index 
<br/><br/><label>ISBN: </label>053495054X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>DATA TRANMISSION SYSTEMS<br/>COMPUTER NETWORKS
<br/><br/><label>LC Class. No.: </label>TK 5105  / S529U 1999