You're reading from CompTIA Security+: SY0-601 Certification Guide - Second Edition

Product type Book

Published in Dec 2020

Publisher Packt

ISBN-13 9781800564244

Pages 550 pages

Edition 2nd Edition

Languages

Concepts

Cybersecurity

Author (1):

Ian Neil

Table of Contents (24) Chapters

Preface

1. Objectives for the CompTIA Security+ 601 exam

Exam Objectives (Domains)

2. Section 1: Security Aims and Objectives

3. Chapter 1: Understanding Security Fundamentals

4. Chapter 2: Implementing Public Key Infrastructure

5. Chapter 3: Investigating Identity and Access Management

6. Chapter 4: Exploring Virtualization and Cloud Concepts

7. Section 2: Monitoring the Security Infrastructure

8. Chapter 5: Monitoring, Scanning, and Penetration Testing

9. Chapter 6: Understanding Secure and Insecure Protocols

10. Chapter 7: Delving into Network and Security Concepts

11. Chapter 8: Securing Wireless and Mobile Solutions

12. Section 3: Protecting the Security Environment

13. Chapter 9: Identifying Threats, Attacks, and Vulnerabilities

14. Chapter 10: Governance, Risk, and Compliance

15. Chapter 11: Managing Application Security

16. Chapter 12: Dealing with Incident Response Procedures

17. Section 4: Mock Tests

18. Chapter 13: Mock Exam 1

19. Mock Exam 1 Solutions

20. Chapter 14: Mock Exam 2

21. Mock Exam 2 Solutions

22. Chapter Review Solutions

23. Other Books You May Enjoy

Introduction to Protocols

Protocol refers to the rules required by different applications for the exchange of data, where the application can perform actions such as running commands on remote systems, sending and receiving emails, and downloading files from the internet. Each application has a special port number that it uses for communication. You can think of ports as being TV channels: if we want to watch sport, we go to the sports channels; if we want to watch the news, we go to the news channel. Applications are the same (if we want to send an email, we use an email application), and they all have a distinct port number for each communication mode.

There are two types of ports: Transmission Control Protocol (TCP) and User Datagram Protocol (UDP). The main difference between the two is that TCP is connection-oriented as it uses a three-way handshake, and UDP is faster but less reliable as it is connectionless. The following diagram shows the three-way handshake:

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