Which type of virtual networks are based on logical local area networks?

Virtual LANs, or VLANs, are designed to create logically segmented networks within a physical network infrastructure. They allow for multiple distinct networks to coexist on a single physical network, effectively enabling separate broadcast domains. This logical segmentation can improve management, security, and efficiency by ensuring that devices within different VLANs cannot directly communicate with each other without a router, even if they are on the same physical network.

VLANs operate at the data link layer (Layer 2) of the OSI model, which is why they are closely associated with local area networking concepts. They rely on tagging frames with VLAN identifiers, allowing network devices such as switches to route traffic appropriately based on these tags, rather than solely based on physical connections.

The other options, while relevant to networking, do not specifically describe networks that are fundamentally based on the logical structure of local area networks. Virtual Private Networks (VPNs) focus on secure communication over the internet, Cloud Virtual Networks pertain to networks offered within cloud service infrastructures, and Logical Subnets are divisions within an IP network that are used for organization but do not specifically denote the same concept as VLANs.