Course Outline
- Introduction to network troubleshooting
- Defining network troubleshooting
- Essential troubleshooting tools
- Standard troubleshooting methodologies
- Overview of Wireshark
- Operational principles 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
- Saving, exporting, and printing data
- Capture and display filters
- Capture filters – basics and filter language
- Display filters – basics and filter language
- Recommended filters
- Lab exercises and case studies
- Utilizing time values and summaries
- Configuring 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
- 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 issues
- Packet losses, excessive ACKs, and retransmissions
- Lab 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 factors in calculating latency
- Identifying periods of high latency
- Utilizing free latency calculators
- Applying the frame.time_delta filter
- Lab exercises and case studies
- Packet loss and retransmissions
- Packet loss and recovery mechanisms in UDP and TCP
- Events involving lost previous segments and out-of-order segments
- Duplicate ACKs and Fast Retransmissions
- TCP retransmissions
- Zero window conditions, window size changes, and related issues
- Lab exercises and case studies
Requirements
Participants should have a foundational understanding of networking concepts and the TCP/IP protocol stack. Attendees are required to bring laptops with Wireshark software installed (available for free download at 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.
