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In today’s interconnected world, managing computer networks efficiently and securely is crucial. Networks can quickly become complex and difficult to manage without proper organization. Network segmentation—the practice of dividing a larger network into smaller, manageable parts—is a fundamental strategy to tackle this complexity. Two primary tools used for segmentation are VLANs (Virtual Local Area Networks) and subnets. Although they are sometimes used interchangeably by newcomers, VLANs and subnets are distinct concepts that serve different purposes and operate at different layers of network communication. Understanding the basics of VLANs and subnets...