課程大綱： Basic Network Troubleshooting Using Wireshark培訓
Introduction to network troubleshooting
What is network troubleshooting
Troubleshooting tools
Troubleshooting methodologies
Introduction to Wireshark
How Wireshark Works
Capturing Packets,
What are 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
Use the default time column setting and precision
Use time between packets
Set a time reference and view capture times
Troubleshooting timing problems
Lab exercises and case studies
Using Statistics Tools
Create I/O graphs
Create TCP Time-Sequence graphs
Analyze flow graphs
Evaluate service response times
Create Round-Trip-Time graphs
Analyze TCP/IP flows
Analyse applications flows
Lab exercises and case studies
The Expert System Basics
Normal and un-normal Network Communications
Causes of Performance Problems
Packet Losses, Ack to longs and Retransmissions
Lab and case studies
Bandwidth Issues
Bandwidth measurement
User/flow throughput calculations
Applications throughput calculations
Bandwidth and throughput problems
Lab exercises and case studies
Latency Issues
The primary points in calculating latency
Plotting high latency times
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
Previous segment lost and Out-of-Order Segments events
Duplicate ACKs and Fast Retransmissions
TCP Retransmissions
Zero window, Window changes and other window problems
Lab exercises and case studies
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