Gert De Laet , CCIE No. 2657, is a CCIE in Routing and Switching and also a CCIE in Security. Gert has more than 10 years of experience in internetworking and works in Brussels, Belgium, for the worldwide CCIE team as product manager at Cisco Systems. Gert holds an engineering degree in electronics.Gert joined Cisco Systems in 1994 as an onsite service engineer; he spent four years in the Technical Assistance Center and joined the CCIE team in 1999. Initially, Gert worked in the CCIE team as proctor/content engineer and later as program manager for EMEA.Gert was a contributing author of CCIE Security Exam Certification Guide (CCIE Self-Study) and CCDA Exam Certification Guide and was a technical reviewer for CCSP VPN Practical Studies and CCIE Security Practice Labs , all published by Cisco Press.Gert Schauwers, CCIE No. 6942, has CCIE certifications in Security, Routing and Switching, and Service Provider. He has six years of experience in internetworking. He is currently working for the CCIE team at Cisco Systems in Brussels, Belgium, as CCIE content engineer. He has an engineering degree in electronics.Gert was a technical reviewer for CCNP BSCI Exam Certification Guide , CCSP Cisco Secure VPN Exam Certification Guide , CCIE Security Exam Certification Guide , and CCIE Security Practice Labs , all published by Cisco Press.