Wilkins, Sean <br/><br/>
CCNP security secure 642-637 official cert guide 
Sean Wilkins 
 - USA  Cisco Press  2011 
 - 637 p. 
<br/><br/><label>ISBN: </label>9781587142802 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telecommunications engineers--Certification
<br/><br/><label>Dewey Class. No.: </label>005.8076