All-In-One / CompTIA Security+® All-in-One Exam Guide, 5e / Conklin / 932-2 / Front Matter
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Chuck Cothren, CISSP, Security+, is a Field Engineer at Ionic Security applying over
20 years of information security experience in consulting, research, and enterprise envi-
ronments. He has assisted clients in a variety of industries including healthcare, banking,
information technology, retail, and manufacturing. He advises clients on topics such
as security architecture, penetration testing, training, consultant management, data loss
prevention, and encryption. He is coauthor of the books Voice and Data Security and
Principles of Computer Security.
Roger L. Davis, CISSP, CISM, CISA, is a Technical Account Manager for Microsoft
supporting enterprise-level companies. He has served as president of the Utah chapter
of the Information Systems Security Association (ISSA) and various board positions for
the Utah chapter of the Information Systems Audit and Control Association (ISACA).
He is a retired Air Force lieutenant colonel with 30 years of military and information
systems/security experience. Mr. Davis served on the faculty of Brigham Young University
and the Air Force Institute of Technology. He coauthored McGraw-Hill Education’s
Principles of Computer Security and Voice and Data Security. He holds a master’s degree in
computer science from George Washington University, a bachelor’s degree in computer
science from Brigham Young University, and performed post-graduate studies in electri-
cal engineering and computer science at the University of Colorado.
Dwayne Williams, CISSP, CASP, is Associate Director, Technology and Research,
for the Center for Infrastructure Assurance and Security at the University of Texas at
San Antonio and is the Director of the National Collegiate Cyber Defense Competi-
tion. Mr. Williams has over 24 years of experience in information systems and network
security. Mr. Williams’s experience includes six years of commissioned military service
as a Communications-Computer Information Systems Officer in the United States Air
Force, specializing in network security, corporate information protection, intrusion de-
tection systems, incident response, and VPN technology. Prior to joining the CIAS,
he served as Director of Consulting for SecureLogix Corporation, where he directed
and provided security assessment and integration services to Fortune 100, government,
public utility, oil and gas, financial, and technology clients. Mr. Williams graduated in
1993 from Baylor University with a bachelor of arts in computer science. Mr. Williams
is a coauthor of Voice and Data Security, Principles of Computer Security, and CompTIA
Security + All-in-One Exam Guide.
About the Technical Editor
Chris Crayton (MCSE) is an author, technical consultant, and trainer. He has worked
as a computer technology and networking instructor, information security director,
network administrator, network engineer, and PC specialist. Chris has authored several
print and online books on PC repair, CompTIA A+, CompTIA Security+, and Microsoft
Windows. He has also served as technical editor and content contributor on numer-
ous technical titles for several leading publishing companies. He holds numerous indus-
try certifications, has been recognized with many professional teaching awards, and has
served as a state-level SkillsUSA competition judge.
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