Book Image

Network Analysis using Wireshark 2 Cookbook - Second Edition

By : Nagendra Kumar Nainar, Yoram Orzach, Yogesh Ramdoss
Book Image

Network Analysis using Wireshark 2 Cookbook - Second Edition

By: Nagendra Kumar Nainar, Yoram Orzach, Yogesh Ramdoss

Overview of this book

This book contains practical recipes on troubleshooting a data communications network. This second version of the book focuses on Wireshark 2, which has already gained a lot of traction due to the enhanced features that it offers to users. The book expands on some of the subjects explored in the first version, including TCP performance, network security, Wireless LAN, and how to use Wireshark for cloud and virtual system monitoring. You will learn how to analyze end-to-end IPv4 and IPv6 connectivity failures for Unicast and Multicast traffic using Wireshark. It also includes Wireshark capture files so that you can practice what you’ve learned in the book. You will understand the normal operation of E-mail protocols and learn how to use Wireshark for basic analysis and troubleshooting. Using Wireshark, you will be able to resolve and troubleshoot common applications that are used in an enterprise network, like NetBIOS and SMB protocols. Finally, you will also be able to measure network parameters, check for network problems caused by them, and solve them effectively. By the end of this book, you’ll know how to analyze traffic, find patterns of various offending traffic, and secure your network from them.
Table of Contents (20 chapters)

Introduction

In this chapter, we will primarily focus on the transport layer of the OSI reference model and learn how to analyze various layer 4 protocol (TCP/UDP/SCTP) operations. The transport layer protocol is a host-to-host communication protocol that is responsible for data exchange between end applications running on different hosts. The User Datagram Protocol (UDP) is a simple connectionless protocol that simply delivers the datagram to the intended recipient without any reliability mechanism. On the other hand, Transport Control Protocol (TCP) is a connection-oriented protocol and its primary purpose is to provide reliable, congestion-aware data delivery between end applications.

More than 80% of the total internet traffic leverages TCP as the transport layer protocol. Any end application that is sensitive to packet loss requires reliability and such applications use TCP...