Stallings, William <br/><br/>
Data and computer communications 

 - 6 
 - New Delhi  Pearson Education  2000 
 - xx, 809p.  
<br/><br/><label>ISBN: </label>817808442 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Communication network<br/>Computer networks--Data communications<br/>Data communications<br/>Network--Data communications