About the Technical Reviewers

Stephen Kalman is a data security trainer. He is the author or tech editor of more than 20 books, courses, and CBT titles. His most recent book is Web Security Field Guide, published by Cisco Press. In addition to those responsibilities he runs a consulting company, Esquire Micro Consultants, that specializes in network security assessments and forensics. Mr. Kalman holds CISSP, CEH, CHFI, CCNA, CCSA (Checkpoint), A+, Network+ and Security+ certifications and is a member of the New York State Bar.

Gerlinde Brady, M.A., CCNP, has been a certified Cisco Systems instructor since 2000. She holds a M.A. degree in education from the University of Hannover, Germany. Besides A+ certification courses and general IT courses, she has been teaching Cisco CCNA and CCNP courses at Cabrillo College since 1999. Her industry experience includes LAN design, network administration, and technical support.

David Kotfila is the director of the Cisco Networking Academy Program at Rensselaer Polytechnic Institute (RPI) in Troy, New York. He is also on the National Advisory Council for the Networking Academy. In the past three years, more than 260 students have received their CCNA and 80 students their CCNP at RPI. Previously, David was the senior manager in charge of training at PSINet, a Tier 1, global, Internet service provider. David enjoys spending time with his family, hiking in the mountains, and kayaking.