ALL IN ONE CompTIA Security+ ™ E X A M G U I D E Second Edition This page intentionally left blank ALL IN ONE CompTIA Security+ ™ E X A M G U I D E Second Edition Gregory White Wm. Arthur Conklin Dwayne Williams Roger Davis Chuck Cothren New York • Chicago • San Francisco • Lisbon London • Madrid • Mexico City • Milan • New Delhi San Juan • Seoul • Singapore • Sydney • Toronto McGraw-Hill is an independent entity from CompTIA. This publication and CD may be used in assisting students to prepare for the CompTIA Security+ Exam. Neither CompTIA nor McGraw-Hill warrants that use of this publication and CD will ensure passing any exam. CompTIA is a registered trademark of CompTIA in the United States and/or other countries. Copyright © 2009 by The McGraw-Hill Companies. All rights reserved. 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How to become CompTIA certified: This training material can help you prepare for and pass a related CompTIA certifica- tion exam or exams. In order to achieve CompTIA certification, you must register for and pass a CompTIA certification exam or exams. In order to become CompTIA certified, you must 1. Select a certification exam provider. For more information please visit http:// www.comptia.org/certification/general_information/exam_locations.aspx. 2. Register for and schedule a time to take the CompTIA certification exam(s) at a convenient location. 3. Read and sign the Candidate Agreement, which will be presented at the time of the exam(s). The text of the Candidate Agreement can be found at http:// www.comptia.org/certification/general_information/candidate_agreement .aspx. 4. Take and pass the CompTIA certification exam(s). For more information about CompTIA’s certifications, such as its industry accep- tance, benefits, or program news, please visit www.comptia.org/certification. CompTIA is a not-for-profit information technology (IT) trade association. Comp- TIA’s certifications are designed by subject matter experts from across the IT industry. Each CompTIA certification is vendor-neutral, covers multiple technologies, and re- quires demonstration of skills and knowledge widely sought after by the IT industry. To contact CompTIA with any questions or comments, please call (1) (630) 678 8300 or email [email protected]. This page intentionally left blank This book is dedicated to the many security professionals who daily work to ensure the safety of our nation’s critical infrastructures. We want to recognize the thousands of dedicated individuals who strive to protect our national assets but who seldom receive praise and often are only noticed when an incident occurs. To you, we say thank you for a job well done! This page intentionally left blank ABOUT THE AUTHORS Dr. Gregory White has been involved in computer and network security since 1986. He spent 19 years on active duty with the United States Air Force and is currently in the Air Force Reserves assigned to the Air Force Information Warfare Center. He obtained his Ph.D. in computer science from Texas A&M University in 1995. His dissertation topic was in the area of computer network intrusion detection, and he continues to conduct research in this area today. He is currently the Director for the Center for Infrastructure Assurance and Security (CIAS) and is an associate professor of information systems at the University of Texas at San Antonio (UTSA). Dr. White has written and presented numerous articles and conference papers on security. He is also the coauthor for three textbooks on computer and network security and has written chapters for two other se- curity books. Dr. White continues to be active in security research. His current research initiatives include efforts in high-speed intrusion detection, infrastructure protection, and methods to calculate a return on investment and the total cost of ownership from security products. Dr. Wm. Arthur Conklin is an assistant professor in the College of Technology at the University of Houston. Dr. Conklin’s research interests lie in software assurance and the application of systems theory to security issues. His dissertation was on the motivat- ing factors for home users in adopting security on their own PCs. He has coauthored four books on information security and has written and presented numerous confer- ence and academic journal papers. A former U.S. Navy officer, he was also previously the Technical Director at the Center for Infrastructure Assurance and Security at the University of Texas at San Antonio. Chuck Cothren, CISSP, is the president of Globex Security, Inc., and applies a wide array of network security experience to consulting and training. This includes perform- ing controlled penetration testing, network security policies, network intrusion detec- tion systems, firewall configuration and management, and wireless security assessments. He has analyzed security methodologies for Voice over Internet Protocol (VoIP) sys- tems and supervisory control and data acquisition (SCADA) systems. Mr. Cothren was previously employed at The University of Texas Center for Infrastructure Assurance and Security. He has also worked as a consulting department manager, performing vulner- ability assessments and other security services for Fortune 100 clients to provide them with vulnerability assessments and other security services. He is coauthor of the book Voice and Data Security as well as Principles of Computer Security. Mr. Cothren holds a B.S. in Industrial Distribution from Texas A&M University. Roger L. Davis, CISSP, CISM, CISA, is Program Manager of ERP systems at the Church of Jesus Christ of Latter-day Saints, managing the Church’s global financial system in over 140 countries. He has served as president of the Utah chapter of the In- formation Systems Security Association (ISSA) and various board positions for the Utah chapter of the Information Systems Audit and Control Association (ISACA). He is
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