What is Network Segmentation in Cybersecurity?
Networking & Infrastructure
Version 1.0 · Published April 2026 · Last verified April 2026
Network segmentation divides a computer network into smaller, isolated sections with access controls between them. Each segment limits the blast radius of a breach, prevents lateral movement by attackers, and enables granular security policies per zone. Micro-segmentation extends this concept to individual workloads.
Why Network Segmentation Matters for Your Cybersecurity Career
Segmentation is one of the most effective defenses against lateral movement. When an attacker compromises one system, proper segmentation prevents them from reaching critical assets like databases or domain controllers. Security architects design segmentation strategies, and GRC analysts verify segmentation controls meet compliance frameworks like PCI DSS.
Which Cybersecurity Roles Use Network Segmentation?
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Network segmentation divides a computer network into smaller, isolated sections with access controls between them. Each segment limits the blast radius of a breach, prevents lateral movement by attackers, and enables granular security policies per zone. Micro-segmentation extends this concept to individual workloads.
Segmentation is one of the most effective defenses against lateral movement. When an attacker compromises one system, proper segmentation prevents them from reaching critical assets like databases or domain controllers. Security architects design segmentation strategies, and GRC analysts verify segmentation controls meet compliance frameworks like PCI DSS.
Cybersecurity professionals who work with Network Segmentation include Security Architect, Security Engineer, GRC Analyst. These roles apply Network Segmentation knowledge within the Networking & Infrastructure domain.
Definitions are original explanations written for career development purposes. For authoritative technical definitions, refer to NIST, ISO, or the relevant standards body.
Last verified: April 2026?Report an inaccuracy
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