Glen E. Clarke (MCSE/MCSD/MCDBA/MCT/CIW SA/Security+/Network+/A+) is an independent trainer and consultant, focusing on network security and security auditing services. Glen spends most of his time delivering certified courses on A+, Network+, Windows Server 2003, SQL Server, Exchange Server, Visual Basic .NET, and ASP.NET. Glen also teaches a number of security related courses covering topics such as vulnerability testing, firewall design, and packet analysis. Glen is an experienced author and technical editor who has worked on nine certification books. Glen designed and coauthored the award nominated A+ Certification Bible and has worked on certification titles involving topics such as Windows 2000/2003 certification, CIW certification, Network+ certification, and Security+ certification. When he's not working, Glen loves to spend quality time with his wife, Tanya, and their three children, Sara, Brendon, and Ashlyn. He is an active member of the martial arts community, where he currently holds his first-degree black belt in Tae Kwon Do. You can visit Glen online at www.gleneclarke.com, or contact him at firstname.lastname@example.org. Ed Tetz graduated in 1990 from Saint Lawrence College in Cornwall, Ontario with a degree in Business Administration. He spent a short time in computer sales, which eventually led to a computer support position. After several years of providing system and LAN support to small and large organizations, in 1994 he added training to his repertoire. He holds certifications for A+, ITIL Foundations Certificate in IT Service Management (IT Infrastructure Library), Microsoft Certified Trainer (MCT), Microsoft Certified Systems Engineer (MCSE), Microsoft Certified Database Administrator (MCDBA), and Chauncey Group's Certified Technical Trainer (CTT). Since 2002, he has been a full-time consultant for a value added reseller in Halifax, Nova Scotia. Over his years of work experience, he has supported Apple Macintosh, IBM OS/2, Linux, Novell NetWare, and all Microsoft operating systems from MS-DOS to Windows Vista, as well as hardware from most of the major vendors. He welcomes comments from his readers and can be contacted at email@example.com, if you are not trapped by the junk mail filters, or firstname.lastname@example.org.