Network Segmentation: All You Need to Know

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Network segmentation divides a network into smaller subnetworks to enhance security, control access, improve performance, simplify management, and aid regulatory compliance by isolating critical systems and data flows. The core function of network segmentation is to prevent lateral movement – and the stakes are rising. Zero Networks’ 2026 Lateral Movement Exposure Report found that a single compromised host exposes 85% of internal systems, while AI-enabled attackers can pivot from an initial foothold in as little as 27 seconds. While network segmentation is key to bolstering cybersecurity defenses and accelerating threat containment, traditional segmentation strategies are struggling to match the speed and sophistication of modern cyber threats. - What is network segmentation? Network segmentation divides a network into smaller, isolated segments, each with its own access controls, so an attacker who compromises one part of the network can’t freely reach the rest. Common methods include VLANs, subnets, access control lists (ACLs), and internal firewalls.

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