Course Outline
- Introduction to network troubleshooting
- Understanding network troubleshooting
- Essential troubleshooting tools
- Troubleshooting methodologies
- Introduction to Wireshark
- How Wireshark operates
- Capturing packets
- Understanding capture and display filters
- Configuring global preferences
- Navigation and colourisation techniques
- Utilising time values and summaries
- Examining basic trace file statistics
- Saving, exporting, and printing data
- Capture and display filters
- Capture filters – fundamentals and filter language
- Display filters – fundamentals and filter language
- Practical filter examples
- Lab exercises and case studies
- Utilising time values and summaries
- Employing the default time column setting and precision
- Measuring time between packets
- Setting a time reference and viewing capture times
- Troubleshooting timing issues
- Lab exercises and case studies
- Utilising statistical tools
- Creating I/O graphs
- Creating TCP Time-Sequence graphs
- Analysing flow graphs
- Evaluating service response times
- Creating Round-Trip-Time graphs
- Analysing TCP/IP flows
- Analysing application flows
- Lab exercises and case studies
- The Expert System basics
- Normal and abnormal network communications
- Causes of performance problems
- Packet losses, prolonged ACKs, and retransmissions
- Lab exercises and case studies
- Bandwidth issues
- Measuring bandwidth
- Calculating user/flow throughput
- Calculating application throughput
- Addressing bandwidth and throughput problems
- Lab exercises and case studies
- Latency issues
- Key points in calculating latency
- Identifying high latency periods
- Free latency calculators
- Using the frame.time_delta filter
- Lab exercises and case studies
- Packet loss and retransmissions
- Packet loss and recovery – UDP and TCP
- Events involving previous segment loss and out-of-order segments
- Duplicate ACKs and fast retransmissions
- TCP retransmissions
- Zero window, window changes, and other window-related problems
- Lab exercises and case studies
Requirements
Participants should possess a basic understanding of networking concepts and the TCP/IP protocol stack. Attendees must bring laptops with the 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.
