Which of the following concepts is described as multiple logical subnets traversing the same physical network?

The concept described as multiple logical subnets traversing the same physical network is VLANs, or Virtual Local Area Networks. VLANs allow network administrators to create distinct sub-networks within a single physical network infrastructure. This segmentation improves network performance and security, as traffic within VLANs can be managed and isolated without requiring separate physical networks.

By implementing VLANs, multiple logical subnetworks can coexist on the same physical switching infrastructure, allowing for better resource utilization and easier management of network policies. Each VLAN acts as an independent network, even if the devices are connected through the same physical switches, making it possible to segregate traffic and reduce broadcast domains.

Other options, while related to networking, do not describe this concept. DHCP (Dynamic Host Configuration Protocol) is used for assigning IP addresses to devices on a network but does not involve logical subnets. DMZ (Demilitarized Zone) refers to a physical or logical subnetwork that contains and exposes an organization's external-facing services, particularly at the network's perimeter. VPNs (Virtual Private Networks) create secure connections over the internet or a private network but do not define how multiple subnets can operate over the same physical infrastructure.