Book Image

CISSP in 21 Days - Second Edition

By : M. L. Srinivasan, None M.L.Srinivasan
Book Image

CISSP in 21 Days - Second Edition

By: M. L. Srinivasan, None M.L.Srinivasan

Overview of this book

Certified Information Systems Security Professional (CISSP) is an internationally recognized and coveted qualification. Success in this respected exam opens the door to your dream job as a security expert with an eye-catching salary. But passing the final exam is challenging. Every year a lot of candidates do not prepare sufficiently for the examination, and fail at the final stage. This happens when they cover everything but do not revise properly and hence lack confidence. This simple yet informative book will take you through the final weeks before the exam with a day-by-day plan covering all of the exam topics. It will build your confidence and enable you to crack the Gold Standard exam, knowing that you have done all you can to prepare for the big day. This book provides concise explanations of important concepts in all 10 domains of the CISSP Common Body of Knowledge (CBK). Starting with Confidentiality, Integrity, and Availability, you will focus on classifying information and supporting assets. You will understand data handling requirements for sensitive information before gradually moving on to using secure design principles while implementing and managing engineering processes. You will understand the application of cryptography in communication security and prevent or mitigate strategies for network attacks. You will also learn security control requirements and how to assess their effectiveness. Finally, you will explore advanced topics such as automated and manual test result analysis and reporting methods. A complete mock test is included at the end to evaluate whether you're ready for the exam. This book is not a replacement for full study guides; instead, it builds on and reemphasizes concepts learned from them.
Table of Contents (27 chapters)
CISSP in 21 Days Second Edition
Credits
About the Author
About the Reviewer
www.PacktPub.com
Preface

Open System Interconnect (OSI) model


Open System Interconnect (OSI) is an International Organization for Standardization (ISO) layered architecture standard that defines a framework for implementing protocols in seven layers.

Note

A protocol is a communication standard that defines rules pertaining to syntax, semantics, and synchronization for communications.

The seven layers in the OSI model are represented as a top-down list in the following illustration:

Layers 7, 6, 5, and 4 work at the host (computer) level and are sometimes called host layers, whereas layers 3, 2, and 1 are related to transmission through the media and are called media layers:

  • Layer 7: This is the application layer that provides application services that are required for application processes. Interaction between the user and the host application is facilitated in this layer. All functionalities in this layer are oriented toward applications.

  • Layer 6: This is the presentation layer that manages the way information or data...