Dumas, M. Barry. <br/><br/>
Principles of computer networks and communications / 
M. Barry Dumas, Morris Schwartz. 
 - Upper Saddle River, N.J. :  Pearson Education,  c2009. 
 - xxix, 519 p. :    ill. ;  27 cm. 
<br/><br/><label>ISBN: </label>9780137142293  (pbk. : International edition) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computer networks.
<br/><br/><label>Dewey Class. No.: </label>004.6   / DUM