Segmented Networks
Segmented networks refer to the practice of dividing a computer network into smaller, isolated subnetworks or segments to improve security, performance, and manageability. This is achieved using techniques like VLANs (Virtual Local Area Networks), subnetting, or physical segmentation with routers and firewalls. By controlling traffic flow between segments, it helps contain threats, reduce broadcast domains, and optimize network resources.
Developers should learn about segmented networks when building or maintaining systems that require enhanced security, such as in cloud environments, microservices architectures, or compliance-driven industries like finance and healthcare. It's crucial for implementing zero-trust models, isolating sensitive data (e.g., payment processing), and improving application performance by reducing network congestion. Understanding this concept aids in designing resilient infrastructure that mitigates lateral movement during cyber attacks.