Stallings, William.  <br/><br/>
Data and computer communications / 
William Stallings. 
 - 7th ed. 
 - New Delhi :  Pearson,  c2004. 
 - xv, 887 pages :  illustrations ;  24 cm. 
<br/><br/>Includes bibliographies and index. 
<br/><br/><label>ISBN: </label>8120323556 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Data transmission systems.<br/>Computer networks.
<br/><br/><label>Dewey Class. No.: </label>004.6 STA