Stallings, William. <br/><br/>
Data and computer communications  
William Stallings 
 - 7th ed. 
 - Delhi :  Pearson Education,  c2004. 
 - xvi, 847 p. :  ill. ;  25 cm. 
<br/><br/><label>ISBN: </label>8129702061 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Data transmission systems.<br/>Computer networks.
<br/><br/><label>Dewey Class. No.: </label>004.6