Stallings, William. <br/><br/>
Data and computer communications / 
William Stallings. 
 - 9th ed. , international ed. 
 - Boston, Mass. :  Pearson,  c2011. 
 - 881 p. :  ill. 
<br/><br/>Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>9780132172172 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Data transmission systems<br/>Computer networks
<br/><br/><label>LC Class. No.: </label>TK 5105  / S724D 2011