Book Image

Wireshark 2 Quick Start Guide

By : Charit Mishra
Book Image

Wireshark 2 Quick Start Guide

By: Charit Mishra

Overview of this book

<p>Wireshark is an open source protocol analyser, commonly used among the network and security professionals. Currently being developed and maintained by volunteer contributions of networking experts from all over the globe. Wireshark is mainly used to analyze network traffic, analyse network issues, analyse protocol behaviour, etc. - it lets you see what's going on in your network at a granular level. This book takes you from the basics of the Wireshark environment to detecting and resolving network anomalies.</p> <p>This book will start from the basics of setting up your Wireshark environment and will walk you through the fundamentals of networking and packet analysis. As you make your way through the chapters, you will discover different ways to analyse network traffic through creation and usage of filters and statistical features. You will look at network security packet analysis, command-line utilities, and other advanced tools that will come in handy when working with day-to-day network operations.</p> <p>By the end of this book, you have enough skill with Wireshark 2 to overcome real-world network challenges.</p>
Table of Contents (14 chapters)
Title Page
Packt Upsell
Contributors
Preface
8
Mastering the Advanced Features of Wireshark
Index

Understanding IEEE 802.11


At the Institute of Electrical and Electronics Engineers (IEEE), several groups of technical professionals as a committee are working on projects, and one of these is 802, which is responsible for developing Local Area Networks (LAN) standards. Specifically, 802.11 contains WLAN standards.

There are a couple of 802.11 standards, for an outmost coverage of standards we will discuss the multiple of them such as 802.11b, 802.11a, 802.11g, and 802.11n:

  • 802.11: Supports a network bandwidth of 1-2 Mbps. This is the reason why many 802.11-compatible devices have become obsolete.
  • 802.11b: This specification uses a signaling frequency of 2.4 Ghz like the 802.11 standard. Technically, a maximum of 11 Mbit transmission rate can be achieved over a 2.4 Ghz band using b specification.

The 802.11b band is divided into 14 overlapping channels, where every channel has 22 Mhz widths. In one instance, there can be a maximum of three non-overlapping channels operating at the same time...