Course Outline
- Introduction to network troubleshooting
- Defining network troubleshooting
- Troubleshooting tools
- Troubleshooting methodologies
- Introduction to Wireshark
- How Wireshark Works
- Capturing Packets,
- Understanding capture and display filters
- Configuring Global Preferences
- Navigation and Colorization Techniques
- Using Time Values and Summaries
- Examining Basic Trace File Statistics
- Save, Export and Print
- Capture and Display Filters
- Capture filters – basics and filter language
- Display filters – basics and filter language
- Useful filters
- Lab exercises and case studies
- Using Time Values and Summaries
- Utilizing the default time column setting and precision
- Measuring time between packets
- Setting a time reference and viewing capture times
- Troubleshooting timing problems
- Lab exercises and case studies
- Using 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
- The Expert System Basics
- Normal and Abnormal Network Communications
- Causes of Performance Problems
- Packet Losses, Excessive Acknowledgments, and Retransmissions
- Lab and case studies
- Bandwidth Issues
- Bandwidth measurement
- User/flow throughput calculations
- Application throughput calculations
- Identifying bandwidth and throughput problems
- Lab exercises and case studies
- Latency Issues
- Key points in calculating latency
- Plotting high latency periods
- Using free latency calculators
- Using the frame.time_delta filter
- Lab exercises and case studies
- Packet Loss and Retransmissions
- Packet loss and recovery mechanisms in UDP and TCP
- Handling 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 should possess basic networking knowledge and an understanding of the TCP/IP protocol stack. Attendees must bring laptops pre-installed with Wireshark software, which can be downloaded for free 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.
