Introduction

      Since 1994, security practitioners around the world have been pursuing a well-known and highly regarded professional credential: the Certified Information Systems Security Professional (CISSP) certification. And since 2001, CISSP For Dummies has been helping security practitioners enhance their security knowledge and earn the coveted CISSP certification.

      Today, there are approximately 140,000 CISSPs worldwide. Ironically, some skeptics might argue that the CISSP certification is becoming less relevant because so many people have earned it. But the CISSP certification isn’t less relevant because more people are attaining it; more people are attaining it because it’s more relevant now than ever. Information security is far more important than at any time in the past, with extremely large-scale data security breaches and highly sophisticated cyberattacks becoming all too frequent occurrences in our modern era.

      Many excellent and reputable information security training and education programs are available. In addition to technical and industry certifications, many fully accredited postsecondary degree, certificate, and apprenticeship programs are available for information security practitioners. And there certainly are plenty of self-taught, highly skilled people working in the information security field who have a strong understanding of core security concepts, techniques, and technologies. But inevitably, there are also far too many charlatans who are all too willing to overstate their security qualifications, preying on the obliviousness of business and other leaders to pursue a fulfilling career in the information security field (or for other, more-dubious purposes).

      The CISSP certification is widely regarded as the professional standard for information security professionals. It enables security professionals to distinguish themselves from others by validating both their knowledge and experience. Likewise, it enables businesses and other organizations to identify qualified information security professionals and verify the knowledge and experience of candidates for critical information security roles in their organizations. Thus, the CISSP certification is more relevant and important than ever before.

About This Book

      Some people say that a CISSP candidate requires a breadth of knowledge many miles across but only a few inches deep. To embellish on this statement, we believe that a CISSP candidate is more like the Great Wall of China, with a knowledge base extending over 3,500 miles — with maybe a few holes here and there, stronger in some areas than others, but nonetheless one of the Seven Wonders of the Modern World.

      The problem with lots of CISSP preparation materials is defining how high (or deep) the Great Wall is. Some material overwhelms and intimidates CISSP candidates, leading them to believe that the wall is as high as it is long. Other study materials are perilously brief and shallow, giving the unsuspecting candidate a false sense of confidence while attempting to step over the Great Wall, careful not to stub a toe. To help you avoid either misstep, CISSP For Dummies answers the question, “What level of knowledge must a CISSP candidate possess to succeed on the CISSP exam?”

      Our goal in this book is simple: to help you prepare for and pass the CISSP examination so that you can join the ranks of respected certified security professionals who dutifully serve and protect organizations and industries around the world. Although we’ve stuffed it chock-full of good information, we don’t expect that this book will be a weighty desktop reference on the shelf of every security professional — although we certainly wouldn’t object.

      Also, we don’t intend for this book to be an all-purpose, be-all-and-end-all, one-stop shop that has all the answers to life’s great mysteries. Given the broad base of knowledge required for the CISSP certification, we strongly recommend that you use multiple resources to prepare for the exam and study as much relevant information as your time and resources allow. CISSP For Dummies,