Data and computer communications/ 
William Stallings 
 - Seventh edition 
 - New Jersey:  Pearson Education,  2004. 
 - xvi, 847 pages:  illustrations;  24 cm. 
<br/><br/> Includes bibliographical references, glossary and index<br/> 
<br/><br/><label>ISBN: </label>0131833111 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computer networks<br/>Data transmission systems
<br/><br/><label>LC Class. No.: </label>Circ TK 5105 .S73 2004