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 Duration 21 hours

Course Outline

Introduction

  • Wireshark as a comprehensive diagnostic instrument rather than a remedial measure

Overview of Network Troubleshooting Methodologies

  • Identification of fundamental causes

Deployment of the Wireshark application

Survey of Wireshark Functional Capabilities

  • Navigation of the user interface architecture

Acquisition of Data in Controlled Testing Scenarios

  • Configuration of the appropriate network interface
  • Capture of data packets across wired and wireless infrastructures

Examination of Recorded Data

  • Analysis of HTTP packet structures
  • Observation of bidirectional TCP session streams
  • Archival of data logs for offline evaluation

Diagnosis of Latency Issues Related to Specific Web Resources

  • Implementation of filtering protocols
  • Review of statistical metrics

Segmentation of Analysis by Protocol Type

  • Assessment of DNS, ARP, IPv4, IPv6, ICMP, UDP, TCP, and HTTP/HTTPS traffic
  • Investigation of persistent latency over extended durations

Evaluation of Latency Metrics

  • Definition of delta time columns

Detection of Systems Compromised by Malware

  • Examination of ARP broadcast traffic

Tracing Origins of Network Activity

  • Intel ANS probe operations
  • Malfunctioning or improperly configured software (packet flooding)

Localization of Performance Deficiencies

  • Generation of statistical visualizations
  • Configuration of color-coding schemes in Wireshark
  • Application of traffic filters
  • Utilization of the Wireshark Expert System and TCP/IP Resolution Flowchart

Diagnosis of Connectivity in Restricted Network Environments

  • Analysis of proxies, firewalls, and endpoint clients

Optimization of Wireshark Settings for Efficient Operation

  • Non-intrusive data evaluation methods

Operational Troubleshooting Procedures

Summary and Final Remarks

Requirements

  • Familiarity with the principles of TCP/IP networking

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