Which of the following would minimize the unauthorized use of the WiFi network?

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An ISP has notified a SOHO user of a usage increase on the user’s network. The user is concerned the WiFi network is being utilized by unauthorized users.

Which of the following would minimize the unauthorized use of the WiFi network?
A . Implement MAC filtering
B . Enable NAT
C . Create a network DMZ
D . Upgrade the encryption standards

Answer: A