N10-005 Question #886: Real Exam Question with Answer & Explanation

The correct answer is D: MAC filtering. MAC filtering creates an allowlist of approved device MAC addresses on the wireless access point. Even if an attacker knows the wireless password (key), their device will be denied access if its MAC address is not on the approved list. Device placement and wireless standard do no

Question

If a wireless key gets compromised, which of the following would MOST likely prevent an unauthorized device from getting onto the network?

Options

ADevice placement
BWireless standard
CEncryption type
DMAC filtering

Explanation

MAC filtering creates an allowlist of approved device MAC addresses on the wireless access point. Even if an attacker knows the wireless password (key), their device will be denied access if its MAC address is not on the approved list. Device placement and wireless standard do not restrict access based on identity. Changing the encryption type does not help if the key itself is already known. MAC filtering acts as an independent second layer of access control beyond the wireless key, making it the best answer in this scenario.

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