Using Wireshark to Analyze and Troubleshoot Wi-Fi Networks

Wi-Fi is the most prevalent wireless network deployed worldwide. This course teaches you how to capture Wi-Fi traffic, analyze Wi-Fi capture in Wireshark, and troubleshoot complex problems in Wireshark, including 802.1X authentication and QoS.
Course info
Level
Intermediate
Updated
July 12, 2017
Duration
4h 18m
Table of contents
Description
Course info
Level
Intermediate
Updated
July 12, 2017
Duration
4h 18m
Description

Are you responsible for designing, implementing or managing a Wi-Fi network? Or simply want to understand how Wi-Fi works? In this course, Using Wireshark to Analyze and Troubleshoot Wi-Fi Networks, you'll learn how to capture, analyze, and troubleshoot Wi-Fi networks in Wireshark. First, you'll learn how to capture Wi-Fi traffic over-the-air, including how to select the best hardware, and how to configure that hardware in your preferred OS environment. Next, you'll explore how Wi-Fi is the only protocol where Wireshark provides physical layer information utilizing the de facto Radiotap standard. Additionally, you'll discover the 802.11 MAC header and elements, learning how to filter on key fields, such as the retry flag to find re-transmitted frames, and the protected flag to determine if your network traffic conforms to your security policies. Lastly, you'll cover the 802.11e Quality of Service (QoS) setting and how to ensure your traffic is being given the appropriate priority over the Wi-Fi network. By the end of this course, you'll have the necessary skills and knowledge to navigate Wireshark to analyze and troubleshoot your Wi-Fi networks with confidence.

About the author
About the author

Dr. Salter is a consultant, writer and technical trainer with over 20 years of industry experience in deploying networks and managing IT operations.

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Transcript
Transcript

Hi, my name is Dr. Avril salter and welcome to my new course titled ͞Using Wireshark to Analyze and Troubleshoot Wi-Fi Networks͟. I am an independent consultant and I have been working on Wireless LANs since I first came to the United States in the 90s.

Today Wi-Fi has permeated every part of our lives. For instance, before I get up in the morning, I check my email, my text messages and calendar over my home Wi-Fi network. When I am at my customer’s office, I can stay connected whether I am working at a desk, or in a conference room, or in the cafeteria. At public places such as shopping malls, my favorite coffee shop, and restaurants all of them provide Wi-Fi connectivity. Even my car has Wi-Fi and allows all my gadgets to stay connected while I drive between different locations.

Wi-Fi has been around since the 90s, and it continues to evolve. Historically Wi-Fi provided network connectivity for computers, it then evolved to support smart phones, tablets and eBook readers. Increasingly, it is providing connectivity as part of the Internet of Things (IoT).

The great thing about Wi-Fi is that you can simply plug it in, turn it on, and you can connect to the network. The bad thing, is that in Wi-Fi networks if it is not deployed correctly the performance can be quite poor.

If you are an IT professional or even frustrated with how Wi-Fi works in your home, then this course is for you.

In this course you are going to learn how to capture traffic over-the-air, how to understand the content of your packet capture, and how to use Wireshark to do a deep-dive analysis your Wi-Fi network and troubleshoot your most complex Wi-Fi issues.

Radio wave may be invisible to the eye, but you will be able to see the traffic going over-the-air. How cool is that!