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 Duration 21 hours

Course Outline

Introduction

  • Why Wireshark is more than a last-resort solution

Foundations of Network Troubleshooting

  • Techniques for root cause analysis

Installing Wireshark

Exploring Wireshark Capabilities

  • Navigating the user interface

Capturing Traffic in a Test Environment

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

Interpreting Logs

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

Investigating Connection Speed Issues for Specific Websites

  • Applying filters
  • Reviewing statistics

Analysis by Traffic Type

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

Monitoring Response Times

  • Configuring delta time columns

Detecting Virus-Infected Machines

  • Analyzing ARP traffic

Identifying Traffic Sources

  • Intel ANS probe
  • Malfunctioning or misconfigured software (e.g., network flooding)

Locating Performance Bottlenecks

  • Generating statistical charts and graphs
  • Customizing colors in Wireshark
  • Refining traffic filters
  • Leveraging the Wireshark Expert System and TCP/IP Resolution Flowchart

Troubleshooting in Secured Network Environments

  • Managing proxies, firewalls, and clients

Optimizing Wireshark for Performance

  • Non-intrusive analysis techniques

Troubleshooting Scenarios

Summary and Conclusion

Requirements

  • A solid grasp of TCP/IP networking principles

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