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

Hypertext Transfer Protocol (HTTP)


Data on the web is transferred using the HTTP/HTTPS application layer protocol. Normal communication in HTTP follows a request/response model, where the communication between a client and a server is coordinated by a set of rules. The client requests for a certain resource to the server and then receives a status code that specifies the current status of the requested resource. If available then, the resource is also sent along with the status code, else the client would receive a not-available status code.

How request/response works

Web servers utilize HTTP to serve web pages to the requesting clients. At the beginning of every HTTP session, the TCP three-way handshake takes place. It creates a dedicated channel between the communicating hosts followed by HTTP and data packets, which are sent in and received while the session is active. For instance, say you are visiting a web server located at http://172.16.136.129 from a client at 172.16.136.1. Using our...