Overview

Wireshark is a free network protocol analyser. This hands-on course provides a comprehensive tour of using Wireshark to troubleshoot networks. The course concentrates on the information needed in order to pass the WCNA exam. Students will gain the most from this course only if they already have a sound knowledge of the TCP/IP protocols.

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Prerequisites

TCP/IP Foundation for engineers

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Delegates will learn how to

By the end of the course delegates will be able to:

  • Download and install Wireshark.
  • Capture and analyse packets with Wireshark.
  • Configure capture and display filters.
  • Customise Wireshark.
  • Troubleshoot networks using Wireshark.
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Outline

What is Wireshark?

Network analysis, troubleshooting, network traffic flows.

Download/install Wireshark.

Wireshark introduction

Capturing packets, libpcap, winpcap, airpcap. Dissectors and plugins. The menus. Right click.

Using Wireshark.

Capturing traffic

Wireshark and switches and routers. Remote traffic capture.

Capturing packets.

Capture filters

Applying, identifiers, qualifiers, protocols, addresses, byte values. File sets, ring buffers.

Capture filters.

Preferences

Configuration folders. Global and personal configurations. Capture preferences, name resolution, protocol settings. Colouring traffic. Profiles.

Customising Wireshark.

Time

Packet time, timestamps, packet arrival times, delays, traffic rates, packets sizes, overall bytes.

Measuring high latency.

Trace file statistics

Protocols and applications, conversations, packet lengths, destinations, protocol usages, strams, flows.

Wireshark statistics.

Display filters

Applying, clearing, expressions, right click, conversations, endpoints, protocols, combining filters, specific bytes, regex filters.

Display traffic.

Streams

Traffic reassembly, UDP and TCP conversations, SSL. Hands on Recreating streams.

Saving

Filtered, marked and ranges. Hands on Export.

TCP/IP Analysis

The expert system. DNS, ARP, IPv4, IPv6, ICMP, UDP, TCP. Hands on Analysing traffic.

IO rates and trends

Basic graphs, Advanced IO graphs. Round Trip Time, throughput rates. Hands on Graphs.

Application analysis

DHCP, HTTP, FTP, SMTP.

Analysing application traffic.

WiFi

Signal strength and interference, monitor mode and promiscuous mode. Data, management and control frames.

WLAN traffic.

VoIP

Call flows, Jitter, packet loss. RTP, SIP.

Playing back calls.

Performance problems

Baselining. High latency, arrival times, delta times.

Identifying poor performance.

Network forensics

Host vs network forensics, unusual traffic patterns, detecting scans and sweeps, suspect traffic.

Signatures.

Command line tools

Tshark, capinfos, editcap, mergecap, text2pcap, dumpcap.

Command tools.

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Why choose QA

Dates & Locations

Need to know

Frequently asked questions

How can I create an account on myQA.com?

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Find more answers to frequently asked questions in our FAQs: Bookings & Cancellations page.

How do QA’s virtual classroom courses work?

Our virtual classroom courses allow you to access award-winning classroom training, without leaving your home or office. Our learning professionals are specially trained on how to interact with remote attendees and our remote labs ensure all participants can take part in hands-on exercises wherever they are.

We use the WebEx video conferencing platform by Cisco. Before you book, check that you meet the WebEx system requirements and run a test meeting (more details in the link below) to ensure the software is compatible with your firewall settings. If it doesn’t work, try adjusting your settings or contact your IT department about permitting the website.

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QA online courses, also commonly known as distance learning courses or elearning courses, take the form of interactive software designed for individual learning, but you will also have access to full support from our subject-matter experts for the duration of your course. When you book a QA online learning course you will receive immediate access to it through our e-learning platform and you can start to learn straight away, from any compatible device. Access to the online learning platform is valid for one year from the booking date.

All courses are built around case studies and presented in an engaging format, which includes storytelling elements, video, audio and humour. Every case study is supported by sample documents and a collection of Knowledge Nuggets that provide more in-depth detail on the wider processes.

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When will I receive my certificate?

Certificates of Achievement are issued at the end the course, either as a hard copy or via email. Read more here.

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