xiii Reviewers Goodheart-Willcox Publisher would like to thank the following individuals for their honest and valuable input in the development of Networking Fundamentals. Dr. Adam Beatty, Director of Computer Information Technology Programs, West Virginia Northern Community College, Wheeling, West Virginia James Burton Browning, Ed.D., Chair, Business, Engineering, and Technology, Brunswick Community College, Supply, North Carolina James C. Church, Assistant Professor, Department of Computer Science and Information Technology, Austin Peay State University, Clarksville, Tennessee David C. Dellacca, MS, Associate Professor, Department of Computer Information and Graphics Technology, Indiana University– Purdue University Indianapolis, Indianapolis, Indiana J.B. Groves III, Instructor of Computer Science, Wharton County Junior College, Richmond, Texas Ron Hutain, Department Head of Automation Technology, Arkansas Tech University, Ozark Campus, Ozark, Arkansas Dr. Ola Jobi, CISSP, Adjunct Faculty Staff , Computer Science and Computer Information Technology, Austin Community College, Austin, Texas Stephan S. Jones, Ph.D., Professor of Information and Communication Sciences, Ball State University, Muncie, Indiana Ronald Kovac, Professor of Information and Communication Sciences, Ball State University, Muncie, Indiana Dennis M. Lutz, Network Manager, Sumitomo Drive Technologies, Chesapeake, Virginia Debra McCusker, M.S.E.E., CCNA1, CCNA2, Faculty Instructor, Information Technology, Alamance Community College, Graham, North Carolina Kevin Mess, Professor/CIT Academic Linux Server Administrator, School of Advanced & Applied Technologies, College of Southern Nevada, Las Vegas, Nevada Robert C. Nelson, Information Technology Program Coordinator, Blinn College, Bryan, Texas Ron Price, Instructor, Information Systems/Computer Science, Spokane Falls Community College, Spokane, Washington Gregg Tennefoss, Professor of Computer Science & IT, Tidewater Community College, Virginia Beach, Virginia