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

 - 4th Edn. 
 - New Delhi  Tata McGraw - Hill Publishing company Ltd.,  2006 
 - xxxiv  1134p.  26 cm. PB 
<br/><br/><label>ISBN: </label>0070634149 
<br/><br/><label>Dewey Class. No.: </label>004.6  / FOR