Tcp/ip network troubleshooting with wireshark course

1. Summary of Network Analysis and Wireshark

TCP/IP Analysis Listing
Top Reasons for Performance Problems
Obtain the New Edition of Wireshark
Recording Traffic
Opening Trace Files
Processing Packets
The Qt Interface Overview
Using Linked Panes
The Icon Toolbar
Master the Intelligent Scrollbar
The Altering Status Bar
Right-Click Functionality
General Analyst Sources
The First Task Whenever You Leave Class

2. Learn Capture Methods and employ Capture Filters

Evaluate Switched Systems
Walk-Via a Sample SPAN Configuration
Evaluate Full-Duplex Links having a Network TAP
Evaluate Wireless Systems
USB Capture
Initial Analyzing Placement
Remote Capture Techniques
Available Capture Interfaces
Save Straight to Disk
Capture File Configurations
Limit Your Capture with Capture Filters
Examine Key Capture Filters

3. Personalize for Efficiency: Configure Your Global Preferences

Initial Step: Produce a Troubleshooting Profile
Personalize the consumer Interface
Add Custom Posts for that Packet List Pane
Set Your Global Capture Preferences
Define Name Resolution Preferences
Configure Individual Protocol Preferences

4. Navigate Rapidly and concentrate Faster with Coloring Techniques

Move About Rapidly: Navigation Techniques
Look for a Packet According to Various Characteristics
Build Permanent Coloring Rules
Identify a Coloring Source
Make use of the Intelligent Scrollbar with Custom Coloring Rules
Apply Temporary Coloring
Mark Packets of great interest

5. Place Network and Application Difficulties with Time Values and Summaries

Check out the Delta Time (Finish-of-Packet to Finish-of-Packet)
Set a period Reference
Compare Timestamp Values
Compare Timestamps of Filtered Traffic
Enable and employ TCP Conversation Timestamps
Compare TCP Conversation Timestamp Values
Determine the first Round-trip Time (iRTT)
Troubleshooting Example Using Time
Evaluate Delay Types

6. Create and Interpret Fundamental Trace File Statistics

Examine Trace File Summary Information
View Active Protocols
Graph Throughput to Place Performance Problems Rapidly
Locate probably the most Active Conversations and Endpoints
Other Conversation Options
Graph the Traffic Flows for any More Complete View
Burst Statistics
Numerous Other Statistics can be found
Quick Summary of Voice over internet protocol Traffic Analysis
SIP and RTP Analysis Overview
SIP Call Setup
Analyzing Call Setup with SIP
Session Bandwidth and RTP Port Definition

7. Concentrate on Traffic Using Display Filters

Display Filters
Filter on Conversations/Endpoints
Build Filters According to Packets
Display Filter Syntax
Use Comparison Operators and Advanced Filters
Filter on Text Strings
Build Filters According to Expressions
Watch out for Common Display Filter Mistakes
Share Your Display Filters

8. TCP/IP Communications and Resolutions Overview

TCP/IP Functionality
When Everything Goes Right
The Multi-Step Resolution Process
Resolution Helped Build the Packet
Where Problems Can Happen
Typical Reasons for Slow Performance

9. Evaluate DNS Traffic

DNS Overview
DNS Packet Structure
DNS Queries
Filter on DNS Traffic
Evaluate Normal/Problem DNS Traffic

10. Evaluate ARP Traffic

ARP Overview
ARP Packet Structure
Filter on ARP Traffic
Evaluate Normal/Problem ARP Traffic

11. Evaluate IPv4 Traffic

IPv4 Overview
IPv4 Packet Structure
Evaluate Broadcast/Multicast Traffic
Filter on IPv4 Traffic
IP Protocol Preferences
Evaluate Normal/Problem IP Traffic

12. Evaluate ICMP Traffic

ICMP Overview
ICMP Packet Structure
Filter on ICMP Traffic
Evaluate Normal/Problem ICMP Traffic

13. Evaluate UDP Traffic

UDP Overview
Watch out for Service Refusals
UDP Packet Structure
Filter on UDP Traffic
Follow UDP Streams to Reassemble Data
Evaluate Normal/Problem UDP Traffic

14. Evaluate TCP Protocol

TCP Overview
The TCP Connection Process
TCP Handshake Problem
Watch Service Refusals
TCP Packet Structure
The TCP Sequencing/Acknowledgment Process
Packet Loss Recognition in Wireshark
Fast Recovery/Fast Retransmission Recognition in Wireshark
Retransmission Recognition in Wireshark
Out-of-Order Segment Recognition in Wireshark
Selective Acknowledgement (SACK)
Window Scaling
Window Size Issue: Receive Buffer Problem
Window Size Issue: Unequal Window Size Beliefs
TCP Sliding Window Overview
Trobleshoot and fix TCP Rapidly with Expert Info
Filter on TCP Traffic and TCP Problems
Correctly Set TCP Preferences
Follow TCP Streams to Reassemble Data 16. Examine Advanced Trace File Statistics
Build Advanced IO Graphs
Graph Round-trip Occasions
Graph TCP Throughput
Find Problems Using TCP Time-Sequence Graphs