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

Qualitative/Quantitative Risk Analysis

There are two different approaches to risk management and they are qualitative and quantitative risk assessments. Let's look at both of them:

  • Qualitative Risk Analysis: Qualitative risk analysis is when the risk is evaluated as a high, medium, or low risk.
  • Quantitative Risk Analysis: Quantitative risk analysis is where you look at the high qualitative risks and give them a number value so that you can associate them with a cost for the risk.

In this example, we are going to grade a risk and its probability from 1 - 9, with 1 being low and 9 being high. If we look at the impact of losing a mail server, the qualitative risk analysis would say that it is high, but the probability of losing it would be low:

Qualitative Probability Quantitative risk
9 3 9*3=27