Stallings, William <br/><br/>
Data and computer communications / 
William Stallings 
 - 9th ed. 
 - Boston :  Prentice Hall,  c2011 
 - xxv, 853 p. :  ill. ;  24 cm. 
<br/><br/>Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>9780131392052 (hc : alk. paper) 0131392050 (hc : alk. paper) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Data transmission systems<br/>Computer networks