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 Duration 21 hours

Course Outline

Introduction

  • Wireshark: More than a last-resort tool

Foundations of Network Troubleshooting

  • Root cause analysis

Installing Wireshark

Overview of Wireshark Capabilities

  • Navigating the user interface

Capturing Traffic in a Test Environment

  • Selecting the appropriate network interface
  • Capturing packets on wired and wireless networks

Log Analysis

  • Examining HTTP packets
  • Reviewing bidirectional TCP streams
  • Saving logs for offline review

Investigating Connection Speed Issues for Specific Websites

  • Applying filters
  • Reviewing statistics

Analysis by Traffic Type

  • DNS, ARP, IPv4, IPv6, ICMP, UDP, TCP, and HTTP/HTTPS
  • Addressing persistent slow connections

Monitoring Response Times

  • Configuring delta time columns

Detecting Virus-Infected Machines

  • Inspecting ARP traffic

Identifying Traffic Sources

  • Intel ANS probes
  • Software malfunctions or misconfigurations (network flooding)

Identifying Performance Bottlenecks

  • Generating statistical charts and graphs
  • Customizing colors in Wireshark
  • Filtering specific traffic
  • Utilizing the Wireshark Expert System and TCP/IP Resolution Flowchart

Troubleshooting in Secured Network Environments

  • Interactions between proxies, firewalls, and clients

Optimizing Wireshark Configuration

  • Non-intrusive analysis techniques

Practical Troubleshooting

Conclusion and Summary

Requirements

  • A solid grasp of TCP/IP networking fundamentals

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