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

Chapter 5: Tapping into the Data Stream

Wireshark provides the ability to capture and analyze network traffic. It is used by network administrators and security analysts in a wide variety of industries, governments, and non-profit organizations. Prior to analysis, you'll need to tap into the data stream and capture packets from the network. Once captured, you can analyze the packets to understand the traffic flow. In this chapter, we'll review the different network architectures, along with the various types of media that can be found on today's networks. Once outlined, this will help you get a better understanding of the complex nature of today's networked environment.

So that you can confidently begin capturing traffic, we'll look at the various options, including capture, input, and output. We'll then review what happens when you tap into a network so that you can identify what types of traffic you'll see. We'll also compare and contrast...