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Course Outline

Introduction

  • Wireshark: More than just a last-resort diagnostic tool

Foundations of Network Troubleshooting

  • Root cause analysis

Installing Wireshark

Wireshark Feature Overview

  • Navigating the user interface

Capturing Traffic in a Test Environment

  • Choosing the correct network interface
  • Capturing packets on both wired and wireless networks

Log Analysis

  • Examining HTTP packets
  • Reviewing TCP stream interactions
  • Exporting logs for offline review

Investigating Connection Speed Issues for Specific Websites

  • Applying filters
  • Reviewing statistical data

Analysis by Traffic Type

  • DNS, ARP, IPv4, IPv6, ICMP, UDP, TCP, and HTTP/HTTPS
  • Persistent slow connections over extended periods

Evaluating Response Times

  • Configuring delta time columns

Detecting Virus-Infected Machines

  • Reviewing ARP traffic

Identifying Traffic Sources

  • Intel ANS probes
  • Malfunctioning or misconfigured software (network flooding)

Pinpointing 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 Connections in Secured Network Environments

  • Working with proxies, firewalls, and clients

Optimizing Wireshark Configuration

  • Non-intrusive analysis

Troubleshooting Strategies

Summary and Conclusion

Requirements

  • Familiarity with TCP/IP networking fundamentals
 21 Hours

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