What is the benefit of using MAC address filtering in a network?

Using MAC address filtering in a network is beneficial because it prevents unauthorized devices from accessing the network. MAC address filtering allows a network administrator to create a list of allowed devices, each identified by their unique MAC address. When a device attempts to connect to the network, the access point or switch checks its MAC address against this list. If the address is not on the list, the device is denied access.

This method adds a layer of security to the network, as it restricts access only to trusted devices. While it is not foolproof—since MAC addresses can be spoofed—it does provide an initial barrier against unauthorized access, making it a commonly used practice in securing wireless networks and devices in a local area network (LAN).

While other benefits such as increasing bandwidth or enhancing data transfer speed are not directly related to MAC address filtering, the primary function is security-focused, ensuring that only recognized and approved devices can join the network, which helps protect sensitive data and resources.