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 Duration 21 hours

Course Outline

Introduction

  • Wireshark -- more than just a last-resort solution

Foundations of Network Troubleshooting

  • Root cause analysis methodologies

Installing Wireshark

Overview of Wireshark Capabilities

  • Navigating the user interface

Capturing Traffic in the Test Environment

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

Log Analysis

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

Analyzing Connection Speed Issues for Specific Websites

  • Applying traffic filters
  • Interpreting statistical data

Analysis by Traffic Type

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

Evaluating Response Times

  • Configuring delta time columns

Detecting Virus-Infected Machines

  • Analyzing ARP traffic patterns

Investigating Traffic Sources

  • Intel ANS probe
  • Identifying broken or misconfigured software causing network flooding

Isolating Performance Bottlenecks

  • Generating statistical charts and graphs
  • Customizing color schemes in Wireshark
  • Applying advanced traffic filters
  • Utilizing the Wireshark Expert System and TCP/IP Resolution Flowchart

Troubleshooting Connections in Secure Network Environments

  • Managing interactions with proxies, firewalls, and clients

Optimizing Wireshark Configuration

  • Performing non-intrusive analysis

Advanced Troubleshooting Techniques

Summary and Conclusion

Requirements

  • Familiarity with TCP/IP networking principles

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