Designing a Secure Network

This final lesson brings together all the concepts from the course into a practical framework for designing a secure network from the ground up. Whether you are building a new network or re-architecting an existing one, the process follows the same structured approach.

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The Design Process

Phase	Activity	Output
1. Requirements Gathering	Understand business needs, compliance, and risk appetite	Requirements document
2. Asset and Data Classification	Identify what needs protecting and its sensitivity	Asset register, data classification
3. Architecture Design	Create the network topology, zones, and control placement	Architecture diagrams
4. Control Selection	Choose specific security controls for each layer	Control matrix
5. Implementation	Build the network according to the design	Configured infrastructure
6. Validation	Test through penetration testing and review	Validation report
7. Operations	Monitor, maintain, and continuously improve	Operational procedures

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Phase 1: Requirements Gathering

Business Requirements