Hooper, Howard <br/><br/>
CCNP security VPN :  642-647 official cert guide / 
Howard Hooper 
 - Indianapolis, IN :  Cisco Press,  c2012 
 - xxxi, 725 p. :  ill. ;  25 cm. +  1 CD-ROM 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label>9781587142567 (hardcover w/cd) 1587142562 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Extranets (Computer networks)--Examinations--Study guides<br/>Computer networks--Security measures--Examinations--Study guides<br/>Telecommunications engineers--Certification--Study guides