Glen E. Clarke, MCSE, MCDBA, MCSD, CompTIA A+, CompTIA Network+, CompTIA Security+, is an independent trainer and consultant, focusing on network security and security auditing services. He delivers certified courses on Windows Server, SQL Server, Exchange Server, Visual Basic .NET, and ASP.NET. Clarke is a co-author of "CompTIA Security+ Certification Practice Exams, Mike Meyers CompTIA Network+ Certification Passport, Third Edition" (both McGraw-Hill), "A+ Bible", and "A+ For Dummies" (both Wiley). He is the author of previous editions of this book and "CompTIA Security+ Certification Study Guide" (McGraw-Hill).

Robb H. Tracy, CompTIA A+, CompTIA Network+, CompTIA Linux+, CNE, has designed and implemented technical training products and curricula for major hardware and software vendors including Novell, Micron Technology, and NextPage, Inc. He has also served on industry-wide certification committees, and is a co-founder of Nebo Technical Institute, Inc., a leading provider of information technology training and consulting. Robb is the author of "LPIC-1/CompTIA Linux+ All-in-One Exam Guide" and other books.