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In this hands-on course, you will receive in-depth training on Wireshark® and TCP/IP communications analysis. You will learn to use Wireshark to identify the most common causes of performance problems in TCP/IP communications.

  • Course Start Date: 2019-10-07
  • Time: 08:30:00 - 16:30:00
  • Duration: 5 days 08:30 AM - 04:30 PM
  • Location: Virtual
  • Delivery Methods(s): Virtual Instructor Led

Course Outline

Pre-Requisites

TCP/IP Networking

Lessons

Learn to use Wireshark to troubleshoot TCP/IP networks while preparing for the Wireshark Certified Network Analyst exam.

In this hands-on course, you will receive in-depth training on Wireshark® and TCP/IP communications analysis. You will learn to use Wireshark to identify the most common causes of performance problems in TCP/IP communications. You will develop a thorough understanding of how to use Wireshark efficiently to spot the primary sources of network performance problems, and you will prepare for the latest Wireshark certification exam.

Topics you will cover in this course include:
  • Traffic capturing techniques and analyzer placement
  • Traffic filtering (capture/display)
  • Customized profiles creation
  • Coloring rules, graphing, field interpretations, and functionality of key TCP/IP communications
  • Normal behavior of ARP, DNS, IP, TCP, UDP, ICMP, and HTTP/HTTPS
  • Latency issue identification
  • Connection establishment concerns
  • Service refusals
  • Common indications of reconnaissance processes and breached hosts
This course includes a voucher for the Wireshark Certified Network Analyst certification exam.

Please bring your own laptop loaded with Wireshark to class. You may download Wireshark for free at www.wireshark.org.

What You'll Learn
  • Top 10 reasons for network performance complaints
  • Place the analyzer properly for traffic capture on a variety of network types
  • Capture packets on wired and wireless networks
  • Configure Wireshark for best performance and non-intrusive analysis
  • Navigate through, split, and work with large traffic files
  • Use time values to identify network performance problems
  • Create statistical charts and graphs to pinpoint performance issues
  • Filter out traffic for more efficient troubleshooting and analysis
  • Customize Wireshark coloring to focus on network problems faster
  • Use Wireshark's Expert System to understand various traffic problems
  • Use the TCP/IP Resolution Flowchart to identify possible communication faults
  • Analyze normal/abnormal Domain Name System (DNS) traffic
  • Analyze normal/abnormal Address Resolution Protocol (ARP) traffic
  • Analyze normal/abnormal Internet Protocol v4 (IPv4) traffic
  • Analyze normal/abnormal Internet Control Messaging Protocol (ICMP) traffic
  • Analyze normal/abnormal User Datagram Protocol (UDP) traffic
  • Analyze normal/abnormal Transmission Control Protocol (TCP) traffic
  • Analyze normal/abnormal Hypertext Transport Protocol (HTTP/HTTPS) traffic
Who Needs to Attend

Anyone interested in learning to troubleshoot and optimize TCP/IP networks and analyze network traffic with Wireshark, especially network engineers, information technology specialists, security analysts, and those preparing for the Wireshark Certified Network Analyst exam.

Course Outline

1. Introduction to Network Analysis and Wireshark

  • TCP/IP Analysis Checklist
  • Top Causes of Performance Problems
  • Get the Latest Version of Wireshark
  • Capturing Traffic
  • Opening Trace Files
  • Processing Packets
  • GTK Interface
  • The Icon Toolbar
  • The Changing Status Bar
  • Right-Click Functionality
  • General Analyst Resources
  • Your First Task When You Leave Class
2. Learn Capture Methods and Use Capture Filters
  • Checksum Issues at Capture
  • Analyze Switched Networks
  • Walk-Through a Sample SPAN Configuration
  • Analyze Full-Duplex Links with a Network TAP
  • Analyze Wireless Networks
  • Initial Analyzing Placement
  • Remote Capture Techniques
  • Available Capture Interfaces
  • Save Directly to Disk
  • Capture File Configurations
  • Limit Your Capture with Capture Filters
  • Examine Key Capture Filters
3. Customize for Efficiency: Configure Your Global Preferences
  • First Step: Create a Troubleshooting Profile
  • Customize the User Interface
  • Add Custom Columns for the Packet List Pane
  • Set Your Global Capture Preferences
  • Define Name Resolution Preferences
  • Configure Individual Protocol Preferences
4. Navigate Quickly and Focus Faster with Coloring Techniques
  • Move Around Quickly: Navigation Techniques
  • Find a Packet Based on Various Characteristics
  • Build Permanent Coloring Rules
  • Identify a Coloring Source
  • Apply Temporary Coloring
  • Mark Packets of Interest
5. Spot Network and Application Issues with Time Values and Summaries
  • Examine the Delta Time (End-of-Packet to End-of-Packet)
  • Set a Time Reference
  • Compare Timestamp Values
  • Compare Timestamps of Filtered Traffic
  • Enable and Use TCP Conversation Timestamps
  • Compare TCP Conversation Timestamp Values
  • Troubleshooting Example Using Time
  • Analyze Delay Types
6. Create and Interpret Basic Trace File Statistics
  • Examine Trace File Summary Information
  • View Active Protocols
  • Graph Throughput to Spot Performance Problems Quickly
  • Locate the Most Active Conversations and Endpoints
  • Other Conversation Options
  • Graph the Traffic Flows for a More Complete View
  • Numerous Other Statistics are Available
  • Quick Overview of VoIP Traffic Analysis Tools
7. Focus on Traffic Using Display Filters
  • Display Filters
  • Filter on Conversations/Endpoints
  • Build Filters Based on Packets
  • Display Filter Syntax
  • Use Comparison Operators and Advanced Filters
  • Filter on Text Strings
  • Build Filters Based on Expressions
  • Watch for Common Display Filter Mistakes
  • Manually Edit the dfilters File
8. Effectively Use Command-Line Tools
  • TShark and Dumpcap Command-Line Tools
  • Capinfos Command-Line Tool
  • Editcap Command-Line Tool
  • Mergecap Command-Line Tool
  • Text2pcap Command-Line Tool
  • Split and Merge Trace Files
9. TCP/IP Communications and Resolutions Overview
  • TCP/IP Functionality
  • When Everything Goes Right
  • The Multi-Step Resolution Process
  • Resolution Helped Build the Packet
  • Where Faults Can Occur
  • Typical Causes of Slow Performance
10. Analyze DNS Traffic
  • DNS Overview
  • DNS Packet Structure
  • DNS Queries
  • Filter on DNS Traffic
  • Analyze Normal/Problem DNS Traffic
11. Analyze ARP Traffic
  • ARP Overview
  • ARP Packet Structure
  • Filter on ARP Traffic
  • Analyze Normal/Problem ARP Traffic
12. Analyze IPv4 Traffic
  • IPv4 Overview
  • IPv4 Packet Structure
  • Analyze Broadcast/Multicast Traffic
  • Filter on IPv4 Traffic
  • IP Protocol Preferences
  • Analyze Normal/Problem IP Traffic
13. Analyze ICMP Traffic
  • ICMP Overview
  • ICMP Packet Structure
  • Filter on ICMP Traffic
  • Analyze Normal/Problem ICMP Traffic
14. Analyze UDP Traffic
  • UDP Overview
  • Watch for Service Refusals
  • UDP Packet Structure
  • Filter on UDP Traffic
  • Follow UDP Streams to Reassemble Data
  • Analyze Normal/Problem UDP Traffic
15. Analyze TCP Protocol
  • TCP Overview
  • The TCP Connection Process
  • TCP Handshake Problem
  • Watch Service Refusals
  • TCP Packet Structure
  • The TCP Sequencing/Acknowledgment Process
  • Packet Loss Detection in Wireshark
  • Fast Recovery/Fast Retransmission Detection in Wireshark
  • Retransmission Detection in Wireshark
  • Out-of-Order Segment Detection in Wireshark
  • Selective Acknowledgement (SACK)
  • Window Scaling
  • Window Size Issue: Receive Buffer Problem
  • Window Size Issue: Unequal Window Size Beliefs
  • TCP Sliding Window Overview
  • Troubleshoot TCP Quickly with Expert Info
  • Filter on TCP Traffic and TCP Problems
  • Properly Set TCP Preferences
  • Follow TCP Streams to Reassemble Data
16. Examine Advanced Trace File Statistics
  • Build Advanced IO Graphs
  • Graph Round Trip Times
  • Graph TCP Throughput
  • Find Problems Using TCP Time-Sequence Graphs
17. Analyze HTTP Traffic
  • HTTP Overview
  • HTTP Packet Structure
  • Filter on HTTP Traffic
  • Reassembling HTTP Objects
  • HTTP Statistics
  • Analyze Normal/Problem HTTP Traffic
18. Analyze SSL-Encrypted Traffic (HTTPS)
  • Examining SSL/HTTPS Traffic
  • Wireshark v1.6.0 Bug Alert #201106
  • Filter on SSL
19. Analyze File Transfer Protocol (FTP) Traffic
  • FTP Overview
  • FTP Packet Structure
  • Analyze Active Mode Connections
  • Analyze Passive Mode Connections
  • Filter on FTP Traffic
  • Analyze Normal/Problem FTP Traffic
20. Your 10 Key Troubleshooting Steps
  • Baseline "NormalTraffic
  • Use Color
  • Look Who's Talking: Examine Conversations and Endpoints
  • Focus by Filtering
  • Create Basic IO Graphs
  • Examine Delta Time Values
  • Examine the Expert System
  • Follow the Streams
  • Graph Bandwidth Use, Round Trip Time, and TCP Time/Sequence Information
  • Watch Refusals and Redirections
Labs

Each section of this course includes hands-on labs to test and reinforce concepts and practice tasks.

Cancellation Policy

We require 16 calendar days notice to reschedule or cancel any registration. Failure to provide the required notification will result in 100% charge of the course. If a student does not attend a scheduled course without prior notification it will result in full forfeiture of the funds and no reschedule will be allowed. Within the required notification period, only student substitutions will be permitted. Reschedules are permitted at anytime with 16 or more calendar days notice. Enrollments must be rescheduled within six months of the cancel date or funds on account will be forfeited.

Training Location

Online Classroom
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About Global Knowledge

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Global Knowledge is the world's leading learning services and professional development solutions provider. We deliver learning solutions to support customers as they adapt to key business transformations and technological advancements that drive the way that organizations around the world differentiate themselves and thrive. Our learning programs, whether designed for a global organization or an individual professional, help businesses close skills gaps and foster an environment of continuous talent development.

Training Provider Rating

This vendor has an overall average rating of 4.39 out of 5 based on 426 reviews.

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Wasn’t as advanced as I thought it would be. There was an issue when the day my course was the first time they used a new platfo ... Read more
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Wasn’t as advanced as I thought it would be. There was an issue when the day my course was the first time they used a new platform.. from adobe to something called zoom; I had to call support line cause it stated our instructor wasn’t present. Thankfully I called cause everyone online was in the adobe virtual classroom waiting for what looked like a teacher who didn’t show up for class (IT didn’t get anything resolved until 10mins after start time). I felt like he was really getting hung up on very basic knowledge for the first half of the course (talking about how to create tabs and drag formulas as an example). I completed files a few times before he was done explaining. There was a scheduled fire drill for them (roughly 30mins)that also cut into our time, which wasn’t deducted from the hour lunch break or the two, fifteen min breaks. I also really wish he touched base more on the automating workbook functions portion which we barely did. I'm happy there were/are those study guides (learning videos) and exams to take on my own time that I hope after I've had the class are still available for me to learn from.

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It was difficult to practice on my PC while trying to watch the presentation online.

Course Reviews

This course has an overall avarage rating of 4.5 out of 5 based on 1 reviews.

Previous

Denis P attended this course Sep 2017

Course Content

Delivery Structure

Instructor Ability

The sound for the training session is bad... the teacher was cutting very often and the class students was not eared properly... beside this... Read more
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The sound for the training session is bad... the teacher was cutting very often and the class students was not eared properly... beside this all good