A VLAN (Virtual Local Area Network) is a network segmentation technique used to divide a physical network into multiple logical subnets. This allows devices in different geographical locations or network segments to be grouped together as if they were on the same physical network, regardless of their actual physical location. VLANs improve network performance, security, and management by reducing broadcast traffic, isolating sensitive data, and enabling easier control of network traffic. VLANs are commonly implemented on network switches and are configured based on factors like department, function, or security level within an organization. Learn more: https://en.wikipedia.org/wiki/VLAN