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

Summary


TCP is a reliable form of communication that facilitates three-way handshakes that and a teardown process ensures the connection is reliable and interactive.

A TCP header is 20 bytes long and consists of various fields such as source and destination port, SEQ and ACK numbers, offset, window size, flag bits, checksum, and options.

The SEQ and ACK numbers are used by TCP-based communications to keep track of data sent across.

A UDP is a connectionless protocol that is a nonreliable means of communication over IP, where the lost and discarded packets are never recovered. A UDP does provide faster transmission and easier creation of sessions.

A UDP header is 8 bytes long and has very few fields, such as source and destination port, packet length, and checksum. Common protocols such as DHCP, TFTP, DNS, and RTP mostly use a UDP as a transport mechanism.