Course Outline
- Introduction to network troubleshooting
- Understanding network troubleshooting
- Essential troubleshooting tools
- Established troubleshooting methodologies
- Overview of Wireshark
- Mechanics of Wireshark
- Capturing Packets
- Understanding capture and display filters
- Configuring Global Preferences
- Navigation and Colorization Techniques
- Utilizing Time Values and Summaries
- Examining Basic Trace File Statistics
- Save, Export and Print functionalities
- Capture and Display Filters
- Capture filters – fundamentals and filter language
- Display filters – fundamentals and filter language
- Practical filter examples
- Lab exercises and case studies
- Utilizing Time Values and Summaries
- Applying default time column settings and precision
- Analyzing time between packets
- Setting a time reference and viewing capture times
- Troubleshooting timing-related issues
- Lab exercises and case studies
- Leveraging Statistics Tools
- Creating I/O graphs
- Creating TCP Time-Sequence graphs
- Analyzing flow graphs
- Evaluating service response times
- Creating Round-Trip-Time graphs
- Analyzing TCP/IP flows
- Analyzing application flows
- Lab exercises and case studies
- Fundamentals of the Expert System
- Normal and Abnormal Network Communications
- Root Causes of Performance Problems
- Packet Loss, Excessive ACKs and Retransmissions
- Lab and case studies
- Bandwidth Issues
- Bandwidth measurement techniques
- User/flow throughput calculations
- Applications throughput calculations
- Addressing bandwidth and throughput problems
- Lab exercises and case studies
- Latency Issues
- Key points in calculating latency
- Plotting high latency periods
- Utilizing free latency calculators
- Using the frame.time_delta filter
- Lab exercises and case studies
- Packet Loss and Retransmissions
- Packet loss and recovery mechanisms - UDP and TCP
- Identifying Previous Segment Lost and Out-of-Order Segments events
- Duplicate ACKs and Fast Retransmissions
- TCP Retransmissions
- Zero window, Window changes and other window-related problems
- Lab exercises and case studies
Requirements
Participants must have basic knowledge of networking concepts and the TCP/IP protocol stack. Attendees are required to bring laptops with Wireshark software installed, which can be downloaded free of charge from www.wireshark.org.
Testimonials (7)
practical case studies
Kamil - P4 Sp. z o.o.
Course - Basic Network Troubleshooting Using Wireshark
Knowlage and patience
Mariusz
Course - Basic Network Troubleshooting Using Wireshark
...and everything :) This was probably the best training I was a part of.
Maciej
Course - Basic Network Troubleshooting Using Wireshark
It is clear Nima is comfortable using Wireshark. He showed us the basic features and tools available to use.
Jonathan - Utility
Course - Basic Network Troubleshooting Using Wireshark
Trainer very engaging and knowledgeable
Effendy Bin Ahmad sata - SBS transit
Course - Basic Network Troubleshooting Using Wireshark
The case studies are really helpful in refreshing my knowledge of wireshark as well as lots of good tips from the trainer based on his experience.
Kai Xiang - SBS transit
Course - Basic Network Troubleshooting Using Wireshark
Trainer is well prepared and dedicated in making us understand. Well done.
