Stallings, William <br/><br/>
Data and computer communications   
by William Stallings 
 - 7th ed. 
 - Singapore  Pearson Education  2004 
 - xvi, 847p. 
<br/><br/><label>ISBN: </label>8129702061 
<br/><br/><label>Dewey Class. No.: </label>384.3  / P04