Jacqueline Kim, CCDA, is the Knowledge Resource Manager with REALTECH Systems Corporation. She designed the Knowledge Exchanged Group that provides technical instruction to clients through instructor-led classes and Web-based training tools. She staffs and manages this group within Knowledge Management, and teaches several classes. Jacqueline also holds Novell CNE and Check Point CCSA/CCSE certifications. She has held positions in both network engineering and pre-sales engineering, during which time she presented lectures in security for Cisco Systems and Network User Groups. Jacqueline is a technical reviewer for the Cisco Press titles Internetworking Technologies Handbook, Second Edition, and Cisco Networking Academy Program: First-Year Companion Guide.