VLAN segmentation (Virtual Local Area Network) is a technique in which a physical network is divided into several logical networks. Each of these logical networks functions independently of each other, although they are all connected via the same physical network. VLAN segmentation offers numerous advantages, including increased security, improved network performance, simplified management and increased flexibility. By separating the network into logical units, companies can better control how data flows and at the same time utilise the network infrastructure more efficiently. These advantages make VLANs an important tool for modern network architectures, especially in larger and more complex networks.