Final answer:
Layer 2 security can be enabled on wired and wireless LANs, but not on virtual LANs (VLAN).
Step-by-step explanation:
Layer 2 security refers to securing the data link layer of the OSI model, which includes technologies like Ethernet and Wi-Fi. Layer 2 security measures help protect against unauthorized access, data interception, and other security threats. While it is possible to enable Layer 2 security on wired and wireless LANs, it is not possible to enable Layer 2 security on a virtual LAN (VLAN).