Students who attend this course will be able to:

Run diagnostic analysis test on networks using the Wireshark Network Analyser

Find design faults in small switched and routed networks

Identify Security zones within a small-medium sized network

Diagnose security weaknesses in small networks using security tools such as NMAP and ZENMAP

Design a small network for maximum security

Students who attend this course will be able to:

Run diagnostic analysis test on networks using the Wireshark Network Analyser

Find design faults in small switched and routed networks

Identify Security zones within a small-medium sized network

Diagnose security weaknesses in small networks using security tools such as NMAP and ZENMAP

Design a small network for maximum security

Course Contents

Troubleshooting Methodology

Challenge Task

Problem solving model

Problem solving worksheet

Identifying Layer 1, 2 & 3 problems

L1/L2/L3 Exercise

Layer 1 Tests

Layer 2 Tests

Layer 3 Tests

Using Wireshark as a troubleshooting tool

Capturing

Display Filters

Capture Filters

Problem diagnosis

What makes Ethernet... Ethernet?

CSMA/CD

Media Standards

Layer 2 vs Layer 3

MAC addresses

IP addresses

Broadcast domains

Hubs, switches & routers

Where do VLANs fit in?

VLAN security

Frame tagging

Trunk/access ports

Traffic between VLANs

Layer 3 switching

VLAN troubleshooting

VLAN islands

Trunk negotiation

Understanding ARP

ARP Request/Reply

ARP cache

ARP spoofing

Switching vs routing

MAC Address Learning

IP Forwarding

Routing Logic

IP & IP Address Logic

IP Datagram

IP Addressing

IP Subnets

Troubleshooting IP

Above IP

TCP

HTTP

IP Utilities – DHCP & DNS – use and abuse

Structure of the Name Space

DNS Request and Reply

DNS configuration

DHCP operation

DHCP control

Ping & Traceroute

Network Security zones

The Importance of Security

Using VLANs to isolate trouble

Viruses, Trojans and Worms

Managing outbreaks

Identifying network design issues

Secure Network design

Security tools

Placement of security devices

The role of Firewalls & Proxy servers

Function of a Firewall

Stateful Packet Inspection

Firewall Security Zones

The DMZ

Network Address Translation

Deep Packet Inspection

Proxy Servers

Web Filtering

Email Monitoring

Intrusion Detection/Prevention

Traffic between zones – troubleshooting ACLs

Basic firewall configuration

ACL configuration

ACL troubleshooting

Using VMWare to troubleshoot OS (Linux & Windows) problems

VMWare NIC operation

Creating a Virtual Machine

VMWare resources

Troubleshooting IP vulnerabilities

DHCP Spoofing

DNS Hijacking

Labs

Tracing Traffic

ARP

Troubleshooting Worksheet

Using VLANs to Create Security Zones

IP Addressing

Ping and Traceroute

TCP/IP Name Resolution

DHCP

TCP Sequence Numbers

HTTP Analysis

Using VMWare

Firewall Operation

Troubleshooting ACLs