Course Outline
- Overview of network diagnostics
- Defining network troubleshooting processes
- Available diagnostic tools
- Methodologies for effective troubleshooting
- Introduction to the Wireshark interface
- Understanding the operational mechanics of Wireshark
- Techniques for packet capture
- Understanding the role of capture and display filters
- Configuring global preferences
- Navigation strategies and color-coding techniques
- Utilizing time values and summary data
- Reviewing fundamental trace file statistics
- Procedures for saving, exporting, and printing data
- Detailed application of capture and display filters
- Capture filters – fundamentals and syntax language
- Display filters – fundamentals and syntax language
- Highly effective filter examples
- Practical lab exercises and case studies
- Application of time values and summaries
- Using default time column settings and precision levels
- Analyzing inter-packet time intervals
- Establishing time references and reviewing capture timestamps
- Diagnosing timing-related issues
- Practical lab exercises and case studies
- Utilization of statistical tools
- Generating I/O graphs
- Creating TCP Time-Sequence graphs
- Interpreting flow graphs
- Assessing service response times
- Constructing Round-Trip-Time (RTT) graphs
- Evaluating TCP/IP traffic flows
- Analyzing application-level flows
- Practical lab exercises and case studies
- Fundamentals of the Expert System
- Identifying normal versus abnormal network communications
- Root causes of performance degradation
- Packet loss, long ACKs, and retransmissions
- Practical lab exercises and case studies
- Addressing bandwidth challenges
- Methods for bandwidth measurement
- Calculating user and flow throughput
- Calculating application throughput
- Diagnosing bandwidth and throughput inefficiencies
- Practical lab exercises and case studies
- Addressing latency challenges
- Key factors in latency calculation
- Visualizing high-latency events
- Utilizing online latency calculation resources
- Implementing the frame.time_delta filter
- Practical lab exercises and case studies
- Packet loss and retransmission analysis
- Packet loss and recovery mechanisms in UDP and TCP
- Detecting previous segment loss and out-of-order segments
- Identifying duplicate ACKs and fast retransmissions
- Understanding TCP retransmission behavior
- Zero window, window size changes, and related issues
- Practical lab exercises and case studies
Requirements
Participants should possess foundational knowledge of networking principles and the TCP/IP protocol stack. Additionally, attendees are required to bring their own laptops with Wireshark installed (available for free download 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.
