Book Image

CompTIA Security+ Certification Guide

By : Ian Neil
Book Image

CompTIA Security+ Certification Guide

By: Ian Neil

Overview of this book

CompTIA Security+ is a worldwide certification that establishes the fundamental knowledge required to perform core security functions and pursue an IT security career. CompTIA Security+ Certification Guide is a best-in-class exam study guide that covers all of CompTIA Security+ 501 exam objectives. It is authored by Ian Neil, who is a world-class trainer of CompTIA Security+ 501. Packed with self-assessment scenarios and realistic exam questions, this guide will help you master the core concepts to succeed in the exam the first time you take it. Using relevant examples, you will learn all the important security fundamentals from Certificates and Encryption to Identity and Access Management concepts. You will then dive into the important domains of the exam; namely, threats, attacks and vulnerabilities, technologies and tools, architecture and design, risk management, and cryptography and Public Key Infrastructure (PKI). This book comes with over 600 practice questions with detailed explanation that is at the exam level and also includes two mock exams to help you with your study plan. This guide will ensure that encryption and certificates are made easy for you.
Table of Contents (18 chapters)
12
Mock Exam 1
13
Mock Exam 2
15
Acronyms

Defense in Depth Model

Defense in Depth is the concept of protecting a company's data with a series of defensive layers so that if one layer fails, another layer will already be in place to thwart an attack. We start with our data, then we encrypt it to protect it:

  • The data is stored on a server
  • The data has file permissions
  • The data is encrypted
  • The data is in a secure area of the building
  • There is a security guard at the building entrance checking identification
  • There is CCTV on the perimeter
  • There is a high fence on the perimeter

Therefore, before someone can steal the data, they have seven layers of security that they must pass through. The concept of defense in depth is that if one layer fails, then the next layer protects: