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

 - 4th ed. 
 - New Delhi  Tata McGraw-Hill  2009 
 - xxxiv+1134 
<br/><br/><label>ISBN: </label>9780070634145 
<br/><br/><label>Dewey Class. No.: </label>001.64404  FOR1;91