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CISA – Certified Information Systems Auditor Study Guide

You're reading from   CISA – Certified Information Systems Auditor Study Guide Aligned with the CISA Review Manual 2019 to help you audit, monitor, and assess information systems

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Product type Paperback
Published in Aug 2020
Publisher Packt
ISBN-13 9781838989583
Length 590 pages
Edition 1st Edition
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Author (1):
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Hemang Doshi Hemang Doshi
Author Profile Icon Hemang Doshi
Hemang Doshi
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Toc

Table of Contents (19) Chapters Close

Preface 1. Section 1: Information System Auditing Process
2. Audit Planning FREE CHAPTER 3. Audit Execution 4. Section 2: Governance and Management of IT
5. IT Governance 6. IT Management 7. Section 3: Information Systems Acquisition, Development, and Implementation
8. Information Systems Acquisition and Development 9. Information Systems Implementation 10. Section 4: Information System Operations and Business Resilience
11. Information System Operations 12. Business Resilience 13. Section 5: Protection of Information Assets
14. Information Asset Security and Control 15. Network Security and Control 16. Public Key Cryptography and Other Emerging Technologies 17. Security Event Management 18. Other Books You May Enjoy

Recovery Time Objective (RTO) and Recovery Point Objective (RPO)

The RTO and RPO are two very important aspects to understand from the perspective of the exam as they are very important concepts in the designing of a disaster recovery strategy.

RTO

The RTO is a measure of the user's tolerance to system downtime. In other words, the RTO is the extent of acceptable system downtime. For example, an RTO of 2 hours indicates that an organization will not be overly impacted if its system is down for up to 2 hours.

RPO

The RPO is a measure of the user's tolerance to data loss. In other words, the RPO is the extent of acceptable data loss. For example, an RPO of 2 hours indicates that an organization will not be overly impacted if it loses data for up to 2 hours.

Let's understand each of them by way of the following diagram:

Let's understand the preceding diagram with the aid of some practical examples:

Example 1: An organization can accept data loss for up to 4 hours. However...

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