Forouzan, Behrouz A. <br/><br/>
Data communications and networking 

 - 5th ed. 
 - Indoia  McgRAW Hill  2013 
 - 1126p. Index 
<br/><br/><label>ISBN: </label>9781259064753 
<br/><br/><label>Dewey Class. No.: </label>004.6