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

An overview of communication security


Communication and the network security domain deals with the security of voice and data communications through local area, Wide area, and Remote access networking. Candidates are expected to have knowledge in the areas of secure communications: securing networks, threats, vulnerabilities, attacks, and countermeasures to the communication networks and protocols that are used in remote access.

Observe the following illustration. We have already covered the application, presentation, and session layer in the OSI model. In this chapter, we will cover transport, networks, data links, and the physical layers of the OSI model:

Transport layer protocols and security

Transport layer does two things. One is to package the data given out by applications to a format that is suitable for transport over the network, and the other thing is to unpack the data received from the network and then format it suitable for applications.

In the transport layer, some of the important...