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Network Protocols for Security Professionals

You're reading from   Network Protocols for Security Professionals Probe and identify network-based vulnerabilities and safeguard against network protocol breaches

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Product type Paperback
Published in Oct 2022
Publisher Packt
ISBN-13 9781789953480
Length 580 pages
Edition 1st Edition
Languages
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Authors (2):
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Deepanshu Khanna Deepanshu Khanna
Author Profile Icon Deepanshu Khanna
Deepanshu Khanna
Yoram Orzach Yoram Orzach
Author Profile Icon Yoram Orzach
Yoram Orzach
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Toc

Table of Contents (23) Chapters Close

Preface 1. Part 1: Protecting the Network – Technologies, Protocols, Vulnerabilities, and Tools
2. Chapter 1: Data Centers and the Enterprise Network Architecture and its Components FREE CHAPTER 3. Chapter 2: Network Protocol Structures and Operations 4. Chapter 3: Security Protocols and Their Implementation 5. Chapter 4: Using Network Security Tools, Scripts, and Code 6. Chapter 5: Finding Protocol Vulnerabilities 7. Part 2: Network, Network Devices, and Traffic Analysis-Based Attacks
8. Chapter 6: Finding Network-Based Attacks 9. Chapter 7: Detecting Device-Based Attacks 10. Chapter 8: Network Traffic Analysis and Eavesdropping 11. Chapter 9: Using Behavior Analysis and Anomaly Detection 12. Part 3: Network Protocols – How to Attack and How to Protect
13. Chapter 10: Discovering LAN, IP, and TCP/UDP-Based Attacks 14. Chapter 11: Implementing Wireless Network Security 15. Chapter 12: Attacking Routing Protocols 16. Chapter 13: DNS Security 17. Chapter 14: Securing Web and Email Services 18. Chapter 15: Enterprise Applications Security – Databases and Filesystems 19. Chapter 16: IP Telephony and Collaboration Services Security 20. Assessments 21. Index 22. Other Books You May Enjoy

Layer 3 protocols – IP and ARP

The purpose of Layer 3 is to forward user information from end to end. This is usually from the user's PC, laptop, or smartphone to the organization's servers or to servers on the internet, but also in IoT devices and sensors, from cellphone to cellphone, and more.

In this section, we will examine the Internet Protocol version 4 (IPv4) and Address Resolution Protocol (ARP) that resolve the local destination MAC address from its IP address. We will discuss IPv4 next.

IPv4

As you can see in Figure 2.17, the layer-3 IP packet is carried inside the payload field of the layer-2 frame, usually Ethernet, and carries inside its payload the layer-4 protocol, which is usually UDP or TCP:

Important Note

An IP can be carried by layer-2 Ethernet or any other frame. Ethernet is the most common frame in layer 2, but an IP can be carried by cellular frames or any other layer 2.

Figure 2.17 – The IPv4 packet...

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