v Goodheart-Willcox Publisher would like to thank the following people who contributed to the development of Computer Service and Repair. Dr. Adam Beatty, A+, Network+, Associate Professor of Information Technology, School of Business, Engineering, Public Service, and Liberal Arts, Washington State Community College, Marietta, Ohio Dr. Serhan Dagtas, Professor, Computer Systems, University of Arkansas at Little Rock, Little Rock, Arkansas Dr. Ola Jobi, Adjunct Professor, Computer Science and Computer Information Technology, Austin Community College, Austin, Texas Mark Maxwell, Senior Cybersecurity Analyst and Writer, Outside Technologies, Westchester, New York Kim Pries, Chief Operating Offi cer, Counselor Connection LLC, El Paso, Texas Contributors Goodheart-Willcox Publisher would like to thank the following individuals for their honest and valuable input in the development of Computer Service and Repair. Dr. Marsha Craig, EdD, CIS Instructor, Calhoun Community College, Decatur, Alabama Franklin Fondjo Fotou, Assistant Professor/Chair, Department of Engineering Technology, Langston University, Langston, Oklahoma Julie K. Hester, Computer Information Systems Instructor, Northeast Alabama Community College, Rainsville, Alabama Steven Hultgren, Adjunct Professor, Johnson County Community College, Overland Park, Kansas Valarie McLain, Computer Information Systems Instructor/Director, Center for Cybersecurity, Lake Superior College, Duluth, Minnesota Stephen D. Paduhovich, Electronics/IT Support Instructor, York County School of Technology, York, Pennsylvania Veronica Pulido, A+, CCNA, IT Teacher, San Elizario High School, San Elizario, Texas Kenneth Schaff er, IT Security Instructor, Southeast Technical Institute, Sioux Falls, South Dakota Brian Volkmuth, Network Administration Instructor, St. Cloud Technical and Community College, St. Cloud, Minnesota Anthony Zampino, Associate Lecturer, Kent State University Trumbull, Warren, Ohio Reviewers