Description

Type

Course

Location

London

Delegates will acquire knowledge and experience about detailed analysis and troubleshooting of typical network protocols and applications with specific focus on switched Ethernet, TCP/IP networks and TCP/IP based applications.

Facilities

London

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Clerks Court 18-20 Farringdon Lane Clerkenwell, EC1R 3AU

Start date

On request

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Subjects

IT

Course programme

Advanced Packet Analysis

Capturing network traffic
Promiscuous Mode
Full Duplex vs. Half Duplex
Capture Speeds
How to capture FDX
Efficient Capture Techniques
Data Collection - Hub/Mini Switch/SPAN Port
SPAN with VLANs
Remote SPAN
Capturing Data - Duplicate Frames
Data Collection - Taps / Splitters
Additional Capture Options
Network Capture Misdemeanors
Capturing Wireless Networks
Planning the Capture Operation (WLAN or cabled LAN)
Planning the Capture Operation
Verify the Installation

Ethernet

Ethernet Overview
IEEE Standards
Ethernet structure
Ethernet
Duplex and speed in switched networks
Autonegotiation
Ethernet Spanning Tree Protocol
Bridge Protocol Data Unit
Spanning Tree Principles
Spanning Tree Issues
Rapid Spanning Tree
Spanning Tree Analysis in Practice
Ethernet
Virtual LANs
802.1Q and 802.1
VLAN Tags in Wireshark
Filtering VLAN ID
Capturing Tagged Frames

Internet Protocol

IP Header
IP Characteristics
IP Addressing
IP Routing

ICMP - Internet Control Message Protocol

ICMP Header structure
ICMP Codes and Types
ICMP Echo Request & Reply
Address Mask Request and Reply
Time Stamp Request and Reply
ICMP error messages
ICMP header structure
Fragmentation
Symptoms of incorrect MTU
ICMP and Routing Issues
Routing Loops and TTL Exceeded
ICMP Redirect
ICMP Redirect header structure
ICMPs in a working net

Address Resolution Protocol

How ARP works
ARP in a Trace File
ARP in a Routed Network
How different Network Devices handle ARP
Gratuitous ARP
Locating problems with ARP
ARP Step by Step
Proxy ARP

Dynamic Host Configuration Protocol

DHCP Functions
BOOTP
DHCP Filter in Wireshark
DHCP Standard Operation: DORA
DHCP Options
DHCP Inform
DHCP Relay
APIPA: when DHCP fails

TCP - Transmission Control Protocol

Introduction to TCP
TCP as Transport Protocol
TCP's use of IP as Network Protocol
TCP Header Layout
Classic TCP Flags
New TCP Flags
TCP Ports and Sockets
Connection Setup
Connection Shutdown
Sequence Numbers and Acknowledgements
Sliding Windows
Nagle Algorithm
TCP Efficiency with short messages

UDP

Introduction to UDP
UDP as a Transport Protocol
UDP Header
Short message transmission using UDP

DNS

Network Naming Systems: DNS & WINS
DNS domain structure
DNS as application protocol
Recursive Search
Authoritative Responses
Cached Responses
Risks of recursive Searching
Cache Poisoning
Important DNS record types
DNS compression
Interpreting Hostname flags
Interpreting the pointer
DNS Return Codes
Server Failure
Nonexistent Domain
Action Refused

FTP

FTP model
Active and Passive FTP
Transfer Modes
FTP access commands
Authentication
FTP file transfer commands
Other FTP commands
LIST Operation in Tracefile
FTP Status Codes
FTP errors in Wireshark
FTP problems
Additional FTP issues

LAB Exercises:

2-1 Spanning Tree
4-1 ICMP
5-1 ARP
6-1 DHCP
7-1 TCP Handshake
7-2 TCP Window Size
7-3 TCP Retransmission
7-4 Nagle Algorithm (Optional)
9-1 DNS
10-1 FTP

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Advanced Packet Analysis with Wireshark Analyzer

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Advanced Packet Analysis with Wireshark Analyzer

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