What does MAC filtering help prevent in an enterprise wireless network?

What does MAC filtering help prevent in an enterprise wireless network?

• A. It prevents clients from communicating with each other.
• B. It prevents access to the Internet entirely.
• C. It prevents IP address spoofing.
• D. It prevents all devices from connecting.

Answer: (A)

MAC filtering works by allowing only devices with approved MAC addresses to connect to the wireless network. By keeping an allowlist, it blocks unauthorized devices from attaching to the network, which means those blocked clients cannot exchange frames with other devices on the network or access resources. In this sense, it prevents those unapproved clients from communicating with the rest of the wireless network. The other options don’t fit as well: MAC filtering does not inherently prevent Internet access for allowed devices, nor does it stop IP address spoofing (spoofing is a different, higher-level concern), and it does not automatically block all devices from connecting—only those whose MAC addresses aren’t on the allowed list.

MAC filtering works by allowing only devices with approved MAC addresses to connect to the wireless network. By keeping an allowlist, it blocks unauthorized devices from attaching to the network, which means those blocked clients cannot exchange frames with other devices on the network or access resources. In this sense, it prevents those unapproved clients from communicating with the rest of the wireless network.

The other options don’t fit as well: MAC filtering does not inherently prevent Internet access for allowed devices, nor does it stop IP address spoofing (spoofing is a different, higher-level concern), and it does not automatically block all devices from connecting—only those whose MAC addresses aren’t on the allowed list.