ABOUT THE AUTHORS Emmett Dulaney, A+, Network+, Security+, MCT, is a respected industry expert. He is currently an assistant professor at Anderson University. He has written several books on Windows, Security, IT project management, and UNIX, including the previous edition of the CompTIA A+ Complete Review Guide and two of Sybex's leading certification titles, CompTIA A+ Complete Study Guide and CompTIA Security+ Study Guide. He is also a well-known certification columnist for CertCities.com. Troy McMillan is a product developer and technical editor for Kaplan IT and holds more than 30 IT certifications, including A+ and Network+. He is also a full-time trainer and the author of Cisco Networking Essentials.