It's a tough market these days for network consultants, but the one commodity there's lots of is fear. There's loads of stuff to be scared of. Which means that canny network experts can get some work by offering to protect computer networks from unauthorized access. It's best to earn a certification before you go touting yourself for work, though. Cisco Systems' Cisco Secure PIX Firewall Advanced (CSPFA) rating is a good vendor-specific one, and is sure to help get you in the door for security work at places with lots of Cisco equipment. CCSP Cisco Secure PIX Firewall Advanced Exam Certification Guide brings you up to speed on the PIX firewall line, with emphasis on the coverage of the CSPFA exam.