Book Image

Wireshark Revealed: Essential Skills for IT Professionals

By : James H Baxter, Yoram Orzach, Charit Mishra
Book Image

Wireshark Revealed: Essential Skills for IT Professionals

By: James H Baxter, Yoram Orzach, Charit Mishra

Overview of this book

This Learning Path starts off installing Wireshark, before gradually taking you through your first packet capture, identifying and filtering out just the packets of interest, and saving them to a new file for later analysis. You will then discover different ways to create and use capture and display filters. By halfway through the book, you'll be mastering Wireshark features, analyzing different layers of the network protocol, and looking for any anomalies.We then start Ethernet and LAN switching, through IP, and then move on to TCP/UDP with a focus on TCP performance problems. It also focuses on WLAN security. Then, we go through application behavior issues including HTTP, mail, DNS, and other common protocols. This book finishes with a look at network forensics and how to locate security problems that might harm the network.This course provides you with highly practical content explaining Metasploit from the following books: 1) Wireshark Essentials 2) Network Analysis Using Wireshark Cookbook 3) Mastering Wireshark
Table of Contents (5 chapters)

Chapter 13. Troubleshooting Bandwidth and Delay Problems

In this chapter we have the following recipes:

  • Measuring total bandwidth on a communication link
  • Measuring bandwidth and throughput per user and per application over a network connection
  • Monitoring jitter and delay using Wireshark
  • Discovering delay/jitter-related application problems

Introduction

When measuring communication lines, there are four major parameters that we should be aware of: bandwidth, delay, jitter, and packet loss. While there are applications that require high bandwidth, there are other applications that are more sensitive to delay and jitter. Packet loss can influence all types of applications, but there are applications that are more sensitive to it and some that are less.

In this chapter we will learn how to measure these parameters, how to check for network problems caused by it, and how to solve them when possible.

Measuring total bandwidth on a communication link

In this recipe, we will see how to measure...