Which authentication method is suitable for standalone MAC Authentication?

Standalone MAC Authentication typically relies on a simple approach to verify the identity of devices attempting to connect to a network, and a barcode scanner fits into this context. A barcode scanner can be used to capture the MAC address of a device for authentication purposes. In environments where standalone MAC Authentication is implemented, devices are often authenticated based on their MAC addresses, and using a barcode scanner simplifies the process of capturing and managing these addresses for network access.

In contrast, the other options involve more complex mechanisms or protocols. WPA2 is a security protocol that provides robust encryption, while 802.1X is an IEEE standard for port-based network access control that typically requires additional infrastructure like RADIUS servers and isn't categorized as standalone MAC Authentication. PSK (Pre-Shared Key) is another authentication method primarily used in environments where devices share a common key, which again differs from the straightforward approach of using MAC addresses directly. Therefore, the use of a barcode scanner aligns well with the straightforward needs of standalone MAC Authentication.