In MAC address filtering, what does a whitelist allow?

In MAC address filtering, a whitelist specifically allows only certain designated MAC addresses to connect to a network. This essentially means that if a device's MAC address is on the whitelist, it is permitted access, while devices not on the list are denied. This method enhances network security by ensuring that only authorized devices are able to communicate on the network.

Whitelisting is commonly used in scenarios where controlling device access is crucial, such as in secure environments or when protecting sensitive data. This ensures that only trusted devices can connect, reducing the risk of unauthorized access and potential security threats. By implementing a whitelist, network administrators can maintain tighter control over who is allowed to join the network, thereby helping to safeguard against intrusions and further enhancing overall network integrity.