Peter Southwick is a Senior Network Engineer at Proteus Networks. He provides both professional services support and training for Proteus Networks customers. Peter was previously a MTS at Hill Associates providing hands-on technical training in all aspects of data communications. Peter is a JNCI, holds JNCIE-M #473 and other Juniper certifications in routing and security. He is an author of Telecommunications, a Beginners Guide, Co-author of ISDN: Concepts, Facilities and Services (both published by McGraw Hill), and contributing author to The Handbook of Local Area Networks from CRC Press. Doug Marschke is an engineering graduate from the University of Michigan currently working with various consulting firms, including Strategic and Cubed networks. He is JNCIE-ER #3, JNCIE-M #41, and JNCIS-FW certified. He was heavily involved in the Juniper certification exams from the start, having contributed to test writing, and is a coauthor of the current JNCIE Enterprise Exam. Doug currently spends his time working with both service providers and enterprises to optimize their IP networks for better performance, cost, and reliability. He also flies around the world sharing his knowledge in a variety of training classes and seminars with topics ranging from troubleshooting to design and certification preparation. If Doug is not on the road, you can find him at his bar in San Francisco, Underdogs Sports Bar, discussing a wide variety of topics. Harry Reynolds has over twenty-five years experience in the networking industry, with the last fifteen years focused on LANs and LAN interconnection. He is CCIE # 4977, and JNCIE # 3, and also holds various other industry and teaching certifications. Harry was a contributing author on the Juniper Network Complete Reference (McGraw- Hill, 2002), and wrote the JNCIE and JNCIP Study Guides for (Sybex Books 2003). Prior to joining Juniper, Harry had served time in the US Navy as an Avionics Technician, worked for equipment manufacturer Micom Systems, and spent much time developing and presenting hands-on technical training curriculums targeted to both enterprise and service provider needs. Harry has presented classes for organizations such as American Institute, American Research Group, Hill Associates, and Data Training Resources. Harry is currently employed by Juniper Networks, where he functions as a senior test engineer in the JUNOS software Core protocols group. Harry also functioned at Juniper as a consulting engineer on an aero-space routing contract, and as a senior education services engineer, where he worked on courseware and certification offerings.