Cover: (ISC)2® CISSP® Certified Information Systems Security Professional Official Study Guide, Ninth Edition by Mike Chapple, James Michael Stewart, Darril Gibson

CISSP® Certified Information Systems Security Professional

Official Study Guide

Ninth Edition


Logo: Wiley




Mike Chapple
James Michael Stewart
Darril Gibson





Logo: Wiley

Copyright © 2021 by John Wiley & Sons, Inc. All rights reserved.

Published by John Wiley & Sons, Inc., Hoboken, New Jersey

Published simultaneously in Canada and the United Kingdom

ISBN: 978-1-119-78623-8

ISBN: 978-1-119-78633-7 (ebk)

ISBN: 978-1-119-78624-5 (ebk)

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To Dewitt Latimer, my mentor, friend, and colleague. I miss you dearly.

—Mike Chapple

To Cathy, your perspective on the world and life often surprises me, challenges me, and makes me love you even more.

—James Michael Stewart

To Nimfa, thanks for sharing your life with me for the past 29 years and letting me share mine with you.

—Darril Gibson


We'd like to express our thanks to Wiley for continuing to support this project. Extra thanks to the development editor, Kelly Talbot, and technical editors, Jerry Rayome, Chris Crayton, and Aaron Kraus, who performed amazing feats in guiding us to improve this book. Thanks as well to our agent, Carole Jelen, for continuing to assist in nailing down these projects.

—Mike, James, and Darril

Special thanks go to my many friends and colleagues in the cybersecurity community who provided hours of interesting conversation and debate on security issues that inspired and informed much of the material in this book.

I would like to thank the team at Wiley, who provided invaluable assistance throughout the book development process. I also owe a debt of gratitude to my literary agent, Carole Jelen of Waterside Productions. My coauthors, James Michael Stewart and Darril Gibson, were great collaborators and I'd like to thank them both for their thoughtful contributions to my chapters.

I'd also like to thank the many people who participated in the production of this book but whom I never had the chance to meet: the graphics team, the production staff, and all of those involved in bringing this book to press.

—Mike Chapple

Thanks to Mike Chapple and Darril Gibson for continuing to contribute to this project. Thanks also to all my CISSP course students who have provided their insight and input to improve my training courseware and ultimately this tome. To my adoring wife, Cathy: Building a life and a family together has been more wonderful than I could have ever imagined. To Slayde and Remi: You are growing up so fast and learning at an outstanding pace, and you continue to delight and impress me daily. You are both growing into amazing individuals. To my mom, Johnnie: It is wonderful to have you close by. To Mark: No matter how much time has passed or how little we see each other, I have been and always will be your friend. And finally, as always, to Elvis: You were way ahead of the current bacon obsession with your peanut butter/banana/bacon sandwich; I think that's proof you traveled through time!

—James Michael Stewart

It's been a pleasure working with talented people like James Michael Stewart and Mike Chapple. Thanks to both of you for all your work and collaborative efforts on this project. The technical editors, Jerry Rayome, Chris Crayton, and Aaron Kraus, provided us with some outstanding feedback, and this book is better because of their efforts. Thanks to the team at Wiley (including project managers, editors, and graphic artists) for all the work you did helping us get this book to print. Last, thanks to my wife, Nimfa, for putting up with my odd hours as I worked on this book.

—Darril Gibson

About the Authors

Mike Chapple, PhD, CISSP, Security+, CySA+, PenTest+, CISA, CISM, CCSP, CIPP/US, is a teaching professor of IT, analytics, and operations at the University of Notre Dame. In the past, he was chief information officer of Brand Institute and an information security researcher with the National Security Agency and the U.S. Air Force. His primary areas of expertise include network intrusion detection and access controls. Mike is a frequent contributor to TechTarget's SearchSecurity site and the author of more than 25 books, including the companion book to this study guide: CISSP Official (ISC)2 Practice Tests, CompTIA CySA+ Study Guide: Exam CS0-001, CompTIA Security+ Study Guide: Exam SY0-601, and Cyberwarfare: Information Operations in a Connected World. Mike offers study groups for the CISSP, SSCP, Security+, and CSA+ certifications on his website at

James Michael Stewart,CISSP, CEH, CHFI, ECSA, CND, ECIH, CySA+, PenTest+, CASP+, Security+, Network+, A+, CISM, and CFR, has been writing and training for more than 25 years, with a current focus on security. He has been teaching CISSP training courses since 2002, not to mention other courses on internet security and ethical hacking/penetration testing. He is the author of and contributor to more than 75 books on security certification, Microsoft topics, and network administration, including CompTIA Security+ Review Guide: Exam SY0-601. More information about Michael can be found at his website at

Darril Gibson,CISSP, Security+, CASP, is the CEO of YCDA (short for You Can Do Anything), and he has authored or coauthored more than 40 books. Darril regularly writes, consults, and teaches on a wide variety of technical and security topics and holds several certifications. He regularly posts blog articles at about certification topics and uses that site to help people stay abreast of changes in certification exams. He loves hearing from readers, especially when they pass an exam after using one of his books, and you can contact him through the blogging site.

About the Technical Editors

Jerry Rayome, BS/MS Computer Science, CISSP, has been employed as a member of the Cyber Security Program at Lawrence Livermore National Laboratory for over 20 years, providing cybersecurity services that include software development, penetrative testing, incident response, firewall implementation/administration, firewall auditing, honeynet deployment/monitoring, cyber forensic investigations, NIST 800-53 control implementation/assessment, cloud risk assessment, and cloud security auditing.

Chris Craytonis a technical consultant, trainer, author, and industry-leading technical editor. 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 numerous technical titles for several leading publishing companies. He holds numerous industry certifications, including CISSP, MCSE, CompTIA S+, N+, A+, and many others. He has also been recognized with many professional and teaching awards, and he has served as a state-level SkillsUSA final competition judge.

Aaron Kraus,CISSP, CCSP, is an information security practitioner, instructor, and author who has worked across industries and around the world. He has spent more than 15 years as a consultant or security risk manager in roles with government, financial services, and tech startups, including most recently in cyber risk insurance, and has spent 13 years teaching, writing, and developing security courseware at Learning Tree International, where he is also dean of cybersecurity curriculum. His writing and editing experience includes official (ISC)2 reference books, practice exams, and study guides for both CISSP and CCSP.


Photograph of Clar Rosso.

Welcome to the (ISC) CISSP® Certified Information Systems Security Professional Official Study Guide, 9th Edition.

Data from the 2020 Cybersecurity Workforce Study shows that 47 percent of employers require their security staff to hold vendor-neutral cybersecurity certifications and that the Certified Information Systems Security Professional (CISSP) is the most commonly held.

According to the study, employers value certified cybersecurity professionals for a number of qualities, from having increased confidence in strategies and practices to communicating and demonstrating that confidence and competence to customers. Other benefits of certification cited by employers include reducing the impact of a security breach, knowing that technology and best practices are up to date, and enhancing the organization's reputation within its given industry.

In addition to engendering confidence on the part of their employers and organizations, security professionals with cybersecurity certifications can boost their salaries by 27 percent on average. There has never been a better time to use your information technology skills to help protect your organization's infrastructure, information, systems, and processes and to improve and grow in your professional journey.

The CISSP certification is the gold standard for mastery in the field of cybersecurity, demonstrating to employers that you have strong knowledge and skills within a broad range of cybersecurity disciplines and an ability to build and manage nearly all aspects of an organization's security operations. It also signals your commitment to ongoing professional development as you continue to stay abreast of industry changes and sharpen your skills.

This study guide will steer you through the eight subject area domains on which the CISSP exam will test your knowledge. Step by step, it will cover the fundamentals involved in each topic and gradually build toward more focused areas of learning to prepare you, based on the content covered in the (ISC)2 CISSP Common Body of Knowledge (CBK).

As you prepare to sit for the CISSP exam, this guide will help you build a solid understanding of concepts of design, implementation, and management of best-in-class cybersecurity programs, as well as the ethical fidelity required of CISSP holders.

I hope that you will find the (ISC) CISSP® Certified Information Systems Security Professional Official Study Guide 9th Edition helpful in your cybersecurity journey, exam preparation, and continued professional growth.


An illustration of the signature of Clar Rosso.

Clar Rosso