Shay, William. A. <br/><br/>
Understanding data communications and networks 
/ William A. Shay 
 - 3rd ed. 
 - Hyderabad  BS Pub.  2011 
 - xxv, 766 p. 
<br/><br/><label>ISBN: </label>9788178001791 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Data communication engineering<br/> Computer networks
<br/><br/><label>Dewey Class. No.: </label>621.3981  / SHA