Level - 3 Network Engineering Training

COURSE OUTLINE:

The Level 3 Network Engineer Programme is designed for networking professionals who have completed Levels 1 and 2 or possess equivalent networking experience. This advanced programme focuses on enterprise IP addressing design, advanced subnetting techniques, network security implementation, and Internet connectivity technologies used in modern enterprise environments.

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Participants will develop the skills required to design scalable network infrastructures, implement advanced security controls, secure network devices, and enable secure Internet access using industry-standard technologies. Through extensive hands-on labs, enterprise-level project case studies, and real-world troubleshooting exercises, learners will gain the practical expertise required of professional Network Engineers.

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Module 1: Enterprise IP Addressing Design

The programme begins with advanced IP addressing design methodologies used by Network Engineers when planning and deploying enterprise networks for customers.

Key Topics

Network Design Fundamentals
Enterprise Addressing Strategies
IP Address Planning and Documentation
Designing Scalable Network Architectures
Address Allocation Best Practices
Customer Network Requirements Analysis
Practical Activities

Designing IP addressing schemes for enterprise customers
Building multi-site network topologies
Implementing structured addressing plans
Validating end-to-end network communication
Real-World Case Studies

Learners will work through advanced customer scenarios to design and implement professional IP addressing solutions for enterprise environments.

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Module 2: Advanced Subnetting Technologies

This module develops mastery of one of the most important skills required by every Network Engineer.

Key Topics

Advanced IPv4 Subnetting
Network Address Planning
Subnet Mask Calculations
Efficient Address Utilisation
Network Segmentation Strategies
Fixed Length Subnet Masking (FLSM)

Participants will learn:

FLSM concepts and implementation
Equal-sized subnet design
Address allocation planning
Practical FLSM network deployment
Variable Length Subnet Masking (VLSM)

Participants will learn:

VLSM concepts and advantages
Efficient IP address utilisation
Designing networks with varying host requirements
Enterprise-level addressing optimisation
Real-world VLSM deployment strategies
Practical Labs

Learners will:

Design their own IP addressing schemes
Build enterprise network topologies
Implement FLSM and VLSM solutions
Verify end-to-end reachability using routing protocols
Troubleshoot addressing and connectivity issues

Module 3: Network Security Fundamentals

This module introduces the essential security principles required to protect enterprise network infrastructures.

Key Topics

Introduction to Network Security
Security Threats and Vulnerabilities
Network Hardening Techniques
Secure Network Design Principles
Defence-in-Depth Concepts
Infrastructure Protection Strategies
Learning Outcomes

Participants will understand how security technologies are integrated into network infrastructures to protect organisational resources and services.

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Module 4: Access Control Lists (ACLs)

This module focuses on one of the most important security technologies available on enterprise routers.

Key Topics

Understanding Access Control Lists (ACLs)
Traffic Filtering Concepts
Packet Inspection and Decision Making
ACL Design Best Practices
Security Policy Implementation
ACL Types

Standard ACLs

Configuration and implementation
Source-based filtering
Traffic control and security
Extended ACLs

Advanced traffic filtering
Protocol and port-based filtering
Enhanced security control
Practical Configuration

Learners will:

Configure Standard ACLs
Configure Extended ACLs
Apply ACLs to network interfaces
Verify ACL operation
Troubleshoot ACL deployments
Analyse packet filtering behaviour
Challenge Project Case Studies

Participants will complete multiple practical projects ranging from basic to advanced enterprise security scenarios.

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Module 5: Router Hardening and Infrastructure Security

This module teaches learners how to transform routers into secure networking devices capable of protecting enterprise infrastructures.

Key Topics

Router Security Fundamentals
Device Hardening Techniques
Secure Administrative Access
Password and Authentication Security
Management Plane Protection
Network Infrastructure Protection
Practical Labs

Securing Cisco routers
Restricting unauthorised access
Implementing security controls
Verifying security configurations
Troubleshooting security-related issues

Module 6: Network Address Translation (NAT)

This module introduces one of the most widely used technologies in modern networking.

Key Topics

Understanding Network Address Translation (NAT)
Why NAT is Required
Private and Public Addressing
Address Conservation Techniques
Internet Connectivity Fundamentals
NAT Types

Static NAT

One-to-one address translation
Publishing internal resources
Dynamic NAT

Address pool configuration
Dynamic address assignment
NAT Overload (PAT)

Port Address Translation (PAT)
Many-to-one address translation
Enterprise Internet access solutions
Practical Configuration

Participants will learn how to:

Configure Static NAT
Configure Dynamic NAT
Configure PAT (NAT Overload)
Verify translation tables
Troubleshoot NAT deployments
Monitor translation processes

Module 7: Internet Connectivity and Enterprise Access

This module explains how organisations and users access resources across the Internet.

Key Topics

How the Internet Works
Public and Private IP Addressing
Internet Service Providers (ISPs)
Enterprise Internet Connectivity
NAT and Internet Access
Traffic Flow Analysis
End-to-End Communication Processes
Practical Labs

Building Internet-enabled enterprise networks
Configuring NAT for Internet access
Verifying external connectivity
Troubleshooting Internet communication issues

Module 8: Integrated Security and Connectivity Projects

This advanced module combines all technologies covered throughout the programme.

Practical Activities

Participants will:

Design enterprise IP addressing schemes
Implement FLSM and VLSM subnetting
Configure routing protocols
Secure network infrastructures using ACLs
Harden Cisco routers
Implement NAT and PAT solutions
Enable secure Internet access
Troubleshoot enterprise networking scenarios
Final Enterprise Super Lab

The programme concludes with a comprehensive Enterprise Super Lab designed to test and validate all skills acquired throughout the course.
 

TRAINING METHODOLOGY:

• Hands-on (To ensure they can enjoy the practical journey and get trained at their own pace)

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MODE OF TRAINING:

• Hands-on Instructor-led Online

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COST OF TRAINING:

• £350.00

 

DURATION OF TRAINING:

• 6 Weeks