Which MAC address authentication method enhances port security on a network?

MAC Filtering is a method used to enhance port security on a network by allowing or denying access to devices based on their MAC addresses. In this approach, a network administrator creates a list of permitted MAC addresses that are allowed to connect to the network. When a device attempts to connect, the switch checks its MAC address against the list. If the MAC address is on the list, access is granted; if not, access is denied. This adds a layer of security by ensuring that only authorized devices can communicate on the network, effectively mitigating unauthorized access.

The other methods mentioned do not directly serve the same purpose as MAC Filtering. MAC Address Spoofing involves tricking the network by altering a device's MAC address to match one that is authorized, which poses a security risk rather than enhancing it. Dynamic ARP Inspection is a security feature that helps prevent ARP spoofing but does not focus specifically on controlling access via MAC addresses. Spam Filtering is primarily concerned with email security and does not relate to network port security or device authentication.