Shay, William A. <br/><br/>
Understanding data communications and networks 
by William A. Shay 
 - 3rd Ed. 
 - Australia  Thomson  2004 
 - xxv, 766 pages;  23 cm. 
<br/><br/> Includes glossary and index 
<br/><br/><label>ISBN: </label>0-534-38317-3 
<br/><br/><label>Dewey Class. No.: </label>004.6 Sh2 2004