Book Image

CISA – Certified Information Systems Auditor Study Guide

By : Hemang Doshi
Book Image

CISA – Certified Information Systems Auditor Study Guide

By: Hemang Doshi

Overview of this book

Are you looking to prepare for the CISA exam and understand the roles and responsibilities of an information systems (IS) auditor? The CISA - Certified Information Systems Auditor Study Guide is here to help you get started with CISA exam prep. This book covers all the five CISA domains in detail to help you pass the exam. You’ll start by getting up and running with the practical aspects of an information systems audit. The book then shows you how to govern and manage IT, before getting you up to speed with acquiring information systems. As you progress, you’ll gain knowledge of information systems operations and understand how to maintain business resilience, which will help you tackle various real-world business problems. Finally, you’ll be able to assist your organization in effectively protecting and controlling information systems with IT audit standards. By the end of this CISA book, you'll not only have covered the essential concepts and techniques you need to know to pass the CISA certification exam but also have the ability to apply them in the real world.
Table of Contents (19 chapters)
1
Section 1: Information System Auditing Process
4
Section 2: Governance and Management of IT
7
Section 3: Information Systems Acquisition, Development, and Implementation
10
Section 4: Information System Operations and Business Resilience
13
Section 5: Protection of Information Assets

Security monitoring tools and techniques

Monitoring security events is a very important aspect of information security. Two important monitoring tools are Intrusion Detection Systems (IDS) and Intrusion Prevention Systems (IPS). IDS only monitor, record, and provide alarms about intrusion activity, whereas IPS also prevent intrusion activities.

Let's study each of them in detail.

Intrusion detection system

An IDS helps to monitor a network (network-based IDS) or a single system (host-based IDS) with the aim of recognizing and detecting an intrusion activity.

Network-based and host-based IDS

The following table differentiates between network-based and host-based IDS:

Network-based IDS Host-based IDS
It monitors activities across the network It monitors the activities of a single system or host.
Comparatively, network-based IDS have high false positives (in other words, a high rate of false alarms) Host-based IDS have low false positives (in other words, a low rate of false...