Shay, William A. <br/><br/>
Understanding data communications and networks  [[Book] /] 
William A. Shay. 
 - 3rd.ed. 
 - Australia ;  Belmont, Calif. :  Thomson Brooks/Cole,  2004. 
 - 766 p. :  ill. ;  25 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/> All age. 
<br/><br/><label>ISBN: </label>7111137868 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Data transmission systems.<br/>Computer networks.
<br/><br/><label>Dewey Class. No.: </label>004.6