virtual lan are configured on
D
Correct answer
Explanation
VLANs are configured on switches to segment broadcast domains. While routers can interconnect VLANs via router-on-a-stick or Layer 3 switching, the actual VLAN configuration (assigning ports to VLANs, creating VLAN IDs) happens on the switch itself. Hubs are Layer 1 devices and cannot create VLANs.