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Course Outline

Introduction

  • Wireshark — more than just a last-resort diagnostic tool

Foundations of Network Troubleshooting

  • Root cause analysis methodologies

Installing Wireshark

Key Features of Wireshark

  • Navigating the user interface

Capturing Traffic in a Test Environment

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

Analyzing Captured Logs

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

Diagnosing Connection Speed Issues with Specific Websites

  • Applying display filters
  • Interpreting statistical data

Analyzing Traffic by Type

  • Covering DNS, ARP, IPv4, IPv6, ICMP, UDP, TCP, and HTTP/HTTPS
  • Investigating persistent connection slowdowns

Evaluating Response Times

  • Configuring delta time columns

Detecting Virus-Infected Machines

  • Analyzing ARP traffic patterns

Identifying Sources of Network Traffic

  • Intel ANS probe
  • Misconfigured or faulty software causing network flooding

Pinpointing Performance Bottlenecks

  • Generating statistical charts and graphs
  • Customizing color coding in Wireshark
  • Refining traffic views with filters
  • Utilizing the Wireshark Expert System and TCP/IP Resolution Flowchart

Troubleshooting Connections in Secured Network Environments

  • Handling proxies, firewalls, and client interactions

Optimizing Wireshark Configuration

  • Performing non-intrusive analysis

Advanced Troubleshooting Techniques

Summary and Conclusion

Requirements

  • A solid understanding of TCP/IP networking principles
 21 Hours

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