Troubleshooting TCP/IP Networks with Wireshark

Code

554

Start Date

2023-06-04

End Date

2023-06-15

City

Doha

Price

5650 $

Language

Participants

1-15

Hotel

Millennium

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This course will enable you to:

Identify and analyze the most common causes of performance problems in TCP/IP communications.
Develop a thorough understanding of how to use Wireshark efficiently to spot the primary sources of network performance problems.
Prepare for the latest Wireshark Certified Network Analyst (WCNA) certification exam.

WHAT YOU'LL LEARN

Top 10 reasons for network performance complaints
Place the analyzer properly for traffic capture on a variety of network types
Capture packets on wired and wireless networks
Configure Wireshark for best performance and non-intrusive analysis
Navigate through, split, and work with large traffic files
Use time values to identify network performance problems
Create statistical charts and graphs to pinpoint performance issues
Filter out traffic for more efficient troubleshooting and analysis
Customize Wireshark coloring to focus on network problems faster
Use Wireshark's Expert System to understand various traffic problems
Use the TCP/IP Resolution Flowchart to identify possible communication faults
Analyze normal/abnormal Domain Name System (DNS) traffic
Analyze normal/abnormal Address Resolution Protocol (ARP) traffic
Analyze normal/abnormal Internet Protocol v4 (IPv4) traffic
Analyze normal/abnormal Internet Control Messaging Protocol (ICMP) traffic
Analyze normal/abnormal User Datagram Protocol (UDP) traffic
Analyze normal/abnormal Transmission Control Protocol (TCP) traffic
Analyze normal/abnormal Hypertext Transport Protocol (HTTP/HTTPS) traffic

OUTLINE

2. Learn Capture Methods and Use Capture Filters

Analyze Switched Networks
Walk-Through a Sample SPAN Configuration
Analyze Full-Duplex Links with a Network TAP
Analyze Wireless Networks
USB Capture
Initial Analyzing Placement
Remote Capture Techniques
Available Capture Interfaces
Save Directly to Disk
Capture File Configurations
Limit Your Capture with Capture Filters
Examine Key Capture Filters

3. Customize for Efficiency: Configure Your Global Preferences

First Step: Create a Troubleshooting Profile
Customize the User Interface
Add Custom Columns for the Packet List Pane
Set Your Global Capture Preferences
Define Name Resolution Preferences
Configure Individual Protocol Preferences

4. Navigate Quickly and Focus Faster with Coloring Techniques

Move Around Quickly: Navigation Techniques
Find a Packet Based on Various Characteristics
Build Permanent Coloring Rules
Identify a Coloring Source
Use the Intelligent Scrollbar with Custom Coloring Rules
Apply Temporary Coloring
Mark Packets of Interest

5. Spot Network and Application Issues with Time Values and Summaries

Examine the Delta Time (End-of-Packet to End-of-Packet)
Set a Time Reference
Compare Timestamp Values
Compare Timestamps of Filtered Traffic
Enable and Use TCP Conversation Timestamps
Compare TCP Conversation Timestamp Values
Determine the Initial Round Trip Time (iRTT)
Troubleshooting Example Using Time
Analyze Delay Types

6. Create and Interpret Basic Trace File Statistics

Examine Trace File Summary Information
View Active Protocols
Graph Throughput to Spot Performance Problems Quickly
Locate the Most Active Conversations and Endpoints
Other Conversation Options
Graph the Traffic Flows for a More Complete View
Burst Statistics
Numerous Other Statistics are Available
Quick Overview of VoIP Traffic Analysis
SIP and RTP Analysis Overview
SIP Call Setup
Analyzing Call Setup with SIP
Session Bandwidth and RTP Port Definition

7. Focus on Traffic Using Display Filters

Display Filters
Filter on Conversations/Endpoints
Build Filters Based on Packets
Display Filter Syntax
Use Comparison Operators and Advanced Filters
Filter on Text Strings
Build Filters Based on Expressions
Watch 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 Faults Can Occur
Typical Causes of Slow Performance

9. Analyze DNS Traffic

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

10. Analyze ARP Traffic

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

11. Analyze IPv4 Traffic

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

12. Analyze ICMP Traffic

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

13. Analyze UDP Traffic

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

14. Analyze TCP Protocol

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

15. Graph Traffic Characteristics

Advanced I/O Graphing
Graph Round Trip Times
Graph TCP Throughput
Find Problems Using TCP Time Sequence Graphs

16. Analyze HTTP Traffic

HTTP Overview
HTTP Packet Structure
Filter on HTTP Traffic
Reassembling HTTP Objects
HTTP Statistics
HTTP Response Time
Overview of HTTP/2
HTTP/2 Analysis Fundamentals
HTTP /2 Frame Format
Analyze Normal/Problem HTTP Traffic

17. Analyze TLS-Encrypted Traffic (HTTPS)

Analyze HTTPS Traffic
Encrypted Alerts
Decryption Steps
Filter on SSL

18. Review Your 10 Key Troubleshooting Steps

Baseline "NormalTraffic
Use Color
Look Who's Talking: Examine Conversations and Endpoints
Focus by Filtering
Create Basic IO Graphs
Examine Delta Time Values
Examine the Expert System
Follow the Streams
Graph Bandwidth Use, Round Trip Time, and TCP Time/Sequence Information
Watch Refusals and Redirections

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Theoretical lectures through PowerPoint presentations and Visual presentations (videos and short films).
Scientific evaluation for the trainee (pre & post-evaluation).
Brainstorming, application and representation of roles.
Practical situations that are appropriate to the scientific material and with the nature of the work of trainees.
Tests at the end of the course.
The participant receives the scientific and practical material for the training program printed and saved on CD or Flash Memory.
Attendance reports for participants and final results reports with general evaluation of the program.
The scientific material of the training program is prepared in a scientific and professional manner, this is done by the best professors and trainers in all fields and all specialties.
At the end of the program, the trainee will receive a certificate of professional attendance, signed and certified by the European Quality Center for Training and Consulting.
Opening hours from 09.00 am to 02.00 pm, the program includes a snack buffet during the lectures.
Daily buffet food throughout the days of the training program, with a closing lunch on the last day of the training program for the distribution of certificates and commemorative photographs to the attendees
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