Figure1.1, “Wireshark captures packets and lets you examine their contents.” shows Wireshark having captured some packets and waiting for you to examine them.Wireshark can capture traffic from many different network media types - and despite its name - including wireless LAN as well.This book will explain all the basics and also some of the advanced features that Wireshark provides.
In the past, such tools were either very expensive, proprietary, or both.
However, with the advent of Wireshark, all that has changed.
Which media types are supported, depends on many things like the operating system you are using.
An overview of the supported media types can be found at https://wiki.wireshark.org/Capture Setup/Network Media.
By reading this book, you will learn how to install Wireshark, how to use the basic elements of the graphical user interface (such as the menu) and what’s behind some of the advanced features that are not always obvious at first sight.