Preface

Almost every device around you is connected to some other device over a network with the motive of sharing information or supporting other devices. With this small picture in your mind, what do you think is the most critical part of a network? Obviously, the channel isn't.

This book is written from a standpoint of using Wireshark to understand and troubleshoot commonly seen network anomalies. It can be the start of your journey into the world of networks/traffic/packet analysis. You can be the savior of your generation or the superhero of your team who helps people with connectivity issues, network administration, computer forensics, and so on. If your routine job requires dealing with computer networks, then this book can give you a strong head start. As the tagline says "From 0 to 1337",that is we will start from the basics gradually moving on to the advanced concepts too.

I have tried to cover the most common scenarios that you could come across while troubleshooting, along with hands-on practical cases that can make you understand the concepts better. By mastering packet analysis, you will learn how to troubleshoot all the way down to the bare wires. This will teach you to make sense of the data flowing around. You will find very interesting sections, such as troubleshooting slow networks, analyzing packets over Wi-Fi, malware analysis, and not to forget, the latest features introduced in Wireshark 2.0 in this book. Happy troubleshooting!