Singh, Brijendra. <br/><br/>
Data communications and computer networks /  
Brijendra Singh. 
 - 3rd ed /   . 
 - New Delhi :   PHI Learning ,   2011. 
 - 399p :   ills.,figs,tables ;   23 cm .  
<br/><br/>Includes bibliography and index 
<br/><br/><label>ISBN: </label>9788120344662  Rs.325.00 
<br/><br/><label>Subjects--Index Terms: </label>DATA TRANSMISSION SYSTEMS COMPUTER NETWORKS 
<br/><br/><label>Dewey Class. No.: </label>004.6  / SIN/D