You're reading from Learn Wireshark A definitive guide to expertly analyzing protocols and troubleshooting networks using Wireshark

Product type Paperback

Published in Aug 2022

Publisher Packt

ISBN-13 9781803231679

Length 606 pages

Edition 2nd Edition

Languages

TCP

Tools

Wireshark

Concepts

Networking

Author (1):

Lisa Bock

View More author details

Table of Contents (28) Chapters

Preface

1. Part 1 Traffic Capture Overview

2. Chapter 1: Appreciating Traffic Analysis FREE CHAPTER

3. Chapter 2: Using Wireshark

4. Chapter 3: Installing Wireshark

5. Chapter 4: Exploring the Wireshark Interface

6. Part 2 Getting Started with Wireshark

7. Chapter 5: Tapping into the Data Stream

8. Chapter 6: Personalizing the Interface

9. Chapter 7: Using Display and Capture Filters

10. Chapter 8: Outlining the OSI Model

11. Part 3 The Internet Suite TCP/IP

12. Chapter 9: Decoding TCP and UDP

13. Chapter 10: Managing TCP Connections

14. Chapter 11: Analyzing IPv4 and IPv6

15. Chapter 12: Discovering ICMP

16. Part 4 Deep Packet Analysis of Common Protocols

17. Chapter 13: Diving into DNS

18. Chapter 14: Examining DHCP

19. Chapter 15: Decoding HTTP

20. Chapter 16: Understanding ARP

21. Part 5 Working with Packet Captures

22. Chapter 17: Determining Network Latency Issues

23. Chapter 18: Subsetting, Saving, and Exporting Captures

24. Chapter 19: Discovering I/O and Stream Graphs

25. Chapter 20: Using CloudShark for Packet Analysis

26. Assessments

27. Other Books You May Enjoy

Summary

In this chapter, we outlined the purpose of DNS, reviewed the types of servers, and then compared the way DNS is transported. We then evaluated the types and classes of RRs and then analyzed the structure and information contained within an RR. Next, we examined a DNS packet and drilled down into the header fields and flags, analyzed the packet structure, and reviewed the query section.

By now, you should have a solid understanding of the DNS query and response process and can recognize the TTL value, which indicates how long the value can remain in the cache. In addition, we saw how to examine DNS statistics in Wireshark and how we can test DNS by using tools such as nslookup and dig. We then summarized by discussing potential threats along with general advice on how to secure DNS.

In the next chapter, we will begin by explaining the need for Dynamic Host Configuration Protocol (DHCP) and review the purpose of this essential protocol. So that you understand how an IP...