TY - BOOK AU - Hooper,Howard TI - CCNP security VPN 642-647 official cert guide SN - 9781587142567 (hardcover w/cd) U1 - 005.8076 23 PY - 2012/// CY - Indianapolis, IN PB - Cisco Press KW - Computer networks KW - Security measures KW - Examinations KW - Study guides KW - Extranets (Computer networks) KW - Telecommunications engineers KW - Certification N1 - Includes index ER -