Stallings, William <br/><br/>
Data and computer communications 

 - 8 
 - New Delhi  Pearson  2007 
 - xvi, 834p.   
<br/><br/> Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>9788131715369 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computer networks<br/>Network security