Book Image

Cisco Certified CyberOps Associate 200-201 Certification Guide

By : Glen D. Singh
Book Image

Cisco Certified CyberOps Associate 200-201 Certification Guide

By: Glen D. Singh

Overview of this book

Achieving the Cisco Certified CyberOps Associate 200-201 certification helps you to kickstart your career in cybersecurity operations. This book offers up-to-date coverage of 200-201 exam resources to fully equip you to pass on your first attempt. The book covers the essentials of network security concepts and shows you how to perform security threat monitoring. You'll begin by gaining an in-depth understanding of cryptography and exploring the methodology for performing both host and network-based intrusion analysis. Next, you'll learn about the importance of implementing security management and incident response strategies in an enterprise organization. As you advance, you'll see why implementing defenses is necessary by taking an in-depth approach, and then perform security monitoring and packet analysis on a network. You'll also discover the need for computer forensics and get to grips with the components used to identify network intrusions. Finally, the book will not only help you to learn the theory but also enable you to gain much-needed practical experience for the cybersecurity industry. By the end of this Cisco cybersecurity book, you'll have covered everything you need to pass the Cisco Certified CyberOps Associate 200-201 certification exam, and have a handy, on-the-job desktop reference guide.
Table of Contents (25 chapters)
1
Section 1: Network and Security Concepts
5
Section 2: Principles of Security Monitoring
9
Section 3: Host and Network-Based Analysis
14
Section 4: Security Policies and Procedures
21
Chapter 17: Mock Exam 1
22
Chapter 18: Mock Exam 2

Understanding the hashing process

Ensuring data is not altered (modified) during transmission is very important, and to help us determine whether the integrity of a message is maintained, we can use hashing algorithms. Hashing algorithms are designed to take an input, such as a string of text or a file, and then use a one-way function to create a digest. The digest is a hash representation of the input and it cannot be reversed. Each unique file or message will generate a unique hash value (digest). This means that if the data is changed in any way, the hash value will be uniquely different.

The following diagram shows the one-way hashing process:

Figure 6.5 – Hashing process

How does this process work between devices? Imagine a sender, Host A, wants to send a message to a destination device, Host B. Rather than Host A sending the message as is, Host A will create a digest of the message. Once the digest has the message created, Host A will send both...