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Network Security Architecture and Zero Trust Principles

Cybersecurity and Digital Risk October 25, 2025
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Introduction

Traditional perimeter-based network security is no longer sufficient in a world of cloud computing, remote work, and mobile devices. This course provides a deep examination of modern network security architectures, culminating in the transformative Zero Trust model. Participants will move beyond basic firewall configuration to master concepts like microsegmentation, Software-Defined Perimeter (SDP), and advanced threat protection in hybrid environments. The course offers a structured approach to designing and implementing a network that continuously verifies every user and device, drastically reducing the attack surface and enhancing resilience against internal and external threats.

Objectives

This program aims to equip security architects and engineers with the advanced knowledge and practical skills required to design, implement, and manage modern, Zero Trust-based network security architectures:

Target Audience

  • Security Architects and Engineers.
  • Network Engineers and Administrators.
  • CISO/CTO seeking to modernize their security posture.
  • Cloud Security Specialists.
  • Security Operations Center (SOC) personnel.
  • Consultants specializing in network transformation.

Methodology

  • Hands-on lab exercises configuring microsegmentation policies.
  • Group design challenge: planning a Zero Trust migration for a fictional company.
  • Case studies analysing major breaches and how ZT could have prevented lateral movement.
  • Technical discussions on SASE vendor solutions and implementation pros/cons.
  • Individual exercises mapping existing security controls to ZT pillars.

Personal Impact

  • Expert-level skills in designing and implementing modern security architectures.
  • Credibility as a specialist in Zero Trust and microsegmentation technologies.
  • Ability to reduce the network attack surface significantly.
  • Enhanced career mobility in architect and leadership roles.
  • Skills to effectively secure cloud and remote work environments.
  • Mastery of advanced network security tools and principles.

Organizational Impact

  • Significant reduction in risk from internal and lateral threat movement.
  • Improved security posture for cloud and remote workforce access.
  • Streamlined and simplified network access control.
  • Better compliance with regulations requiring strong access controls.
  • Faster incident detection and containment due to microsegmentation.
  • Foundation for a secure, scalable digital transformation strategy.

Course Outline

Unit 1: The Evolution of Network Security

Section 1.1: Perimeter Defence Challenges
  • Limitations of the traditional castle-and-moat model.
  • Impact of cloud, mobility, and IoT on the network boundary.
  • Understanding the lateral movement problem after a perimeter breach.
  • The need for a trust-less security model.
Section 1.2: Introduction to Zero Trust
  • Core principles of Zero Trust: Never Trust, Always Verify.
  • The NIST Zero Trust Architecture (ZTA) model and components.
  • The role of the Policy Enforcement Point (PEP) and Policy Decision Point (PDP).
  • Mapping Zero Trust to modern business and operational needs.

Unit 2: Designing the Zero Trust Network

Section 2.1: Identity as the New Perimeter
  • Central role of Identity and Access Management (IAM) in Zero Trust.
  • Implementing Multi-Factor Authentication (MFA) and adaptive authentication.
  • Continuous and context-aware authorization.
  • Managing and verifying non-human identities (API keys, service accounts).
Section 2.2: Segmentation and Microsegmentation
  • Traditional network segmentation (VLANs, ACLs).
  • Techniques for microsegmentation (e.g., host-based, network-based, cloud-native).
  • Policy definition and enforcement for east-west traffic control.
  • Isolation of critical assets and high-risk environments.

Unit 3: Modern Network Security Components

Section 3.1: Secure Access Technologies
  • Software-Defined Perimeter (SDP) and its advantages over traditional VPNs.
  • Cloud Access Security Brokers (CASBs) for cloud service governance.
  • Secure Web Gateway (SWG) and DNS-layer security.
  • The SASE (Secure Access Service Edge) architecture model.
Section 3.2: Advanced Threat Prevention
  • Next-Generation Firewall (NGFW) capabilities and deep packet inspection.
  • Intrusion Prevention Systems (IPS) and advanced malware sandboxing.
  • Techniques for encrypted traffic inspection (TLS/SSL decryption).
  • Behavioral analytics and network detection and response (NDR).

Unit 4: Implementation and Deployment Strategies

Section 4.1: Implementation Roadmap
  • Developing a phased approach to Zero Trust adoption.
  • Identifying high-value targets and building initial Zero Trust zones.
  • Best practices for policy discovery and migration from legacy systems.
  • Measuring the success of Zero Trust implementation.
Section 4.2: Operationalizing the Architecture
  • Integration of Zero Trust with Security Orchestration, Automation, and Response (SOAR).
  • Continuous monitoring and auditing of ZT policies.
  • Troubleshooting common connectivity and policy enforcement issues.
  • Security considerations for operational technology (OT) networks.

Unit 5: Cloud and Future Networks

Section 5.1: Zero Trust in the Cloud
  • Applying ZT principles to multi-cloud and hybrid cloud environments.
  • Leveraging native cloud security services (e.g., AWS Security Hub, Azure Policy).
  • Securing containerized and serverless environments with microsegmentation.
  • Cloud Identity and Posture Management (CIEM, CSPM) for ZT.
Section 5.2: Emerging Network Security Trends
  • Impact of 5G and edge computing on network security design.
  • Introduction to quantum-safe cryptography and network requirements.
  • Future of SASE and Unified Endpoint Management (UEM).
  • Automation and Artificial Intelligence in network security policy management.

Ready to Learn More?

Have questions about this course? Get in touch with our training consultants.

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Upcoming Sessions

24 Nov

Paris

November 24, 2025 - November 28, 2025

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15 Dec

Riyadh

December 15, 2025 - December 19, 2025

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05 Jan

Rome

January 05, 2026 - January 07, 2026

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