Book Image

Learn Wireshark, - Second Edition

By : Lisa Bock
5 (1)
Book Image

Learn Wireshark, - Second Edition

5 (1)
By: Lisa Bock

Overview of this book

Wireshark is a popular and powerful packet analysis tool that helps network administrators investigate latency issues and potential attacks. Over the years, there have been many enhancements to Wireshark’s functionality. This book will guide you through essential features so you can capture, display, and filter data with ease. In addition to this, you’ll gain valuable tips on lesser-known configuration options, which will allow you to complete your analysis in an environment customized to suit your needs. This updated second edition of Learn Wireshark starts by outlining the benefits of traffic analysis. You’ll discover the process of installing Wireshark and become more familiar with the interface. Next, you’ll focus on the Internet Suite and then explore deep packet analysis of common protocols such as DNS, DHCP, HTTP, and ARP. The book also guides you through working with the expert system to detect network latency issues, create I/O and stream graphs, subset traffic, and save and export captures. Finally, you’ll understand how to share captures using CloudShark, a browser-based solution for analyzing packet captures. By the end of this Wireshark book, you’ll have the skills and hands-on experience you need to conduct deep packet analysis of common protocols and network troubleshooting as well as identify security issues.
Table of Contents (28 chapters)
1
Part 1 Traffic Capture Overview
6
Part 2 Getting Started with Wireshark
11
Part 3 The Internet Suite TCP/IP
16
Part 4 Deep Packet Analysis of Common Protocols
21
Part 5 Working with Packet Captures

An overview of the OSI model

The OSI model is a seven-layer framework that outlines the main functions of each layer, which represents a grouping of protocols that perform a specific function. Understanding the model will better prepare you for analyzing traffic with Wireshark. In addition, you'll be able to recognize the role of the protocols involved during a transaction.

Note

All protocols have a specific purpose on the network. Today, Wireshark has dissectors for most protocols, and new ones are added all the time.

In this section, we'll take a step back and learn how the framework began, along with recognizing who benefits from using this model.

Let's start with the inspiration behind the OSI model.

Developing the framework

We started this journey during the period of the late 1960s to the mid-1970s, where we saw an expansion in computing, along with advances in technology in general. In addition to this, we witnessed the development of computers...