Stallings, William <br/><br/>
Data Computer Communication 

 - 8th ed. 
 - New delhi :  PHI Learning private Limited,  c2007. 
 - xvii, 878 p.;  [20] 
<br/><br/><label>ISBN: </label>9788120330788 
<br/><br/><label>Dewey Class. No.: </label>004.22  / STA/DAT