Data communications and networking. 
By Behrouz A. Forouzan. 
 - 2nd. 
 - New Delhi.:  Tata mcgraw hill.,  2003. 
 - xxxii, 944 p.:  ill.;  20 cm. 
<br/><br/><label>ISBN: </label>978-0-07-049935-5 0-07-049935-7 
<br/><br/><label>Subjects--Index Terms: </label>Computer science. Computer science. Data communications and networking. 
<br/><br/><label>Dewey Class. No.: </label>004.6