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A home user wants to prevent unauthorized devices from connecting to their wireless network. Which configuration change would be MOST effective?
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Alex
Access control on a wireless network comes from cryptography, not from obscurity. Turning on WPA3 with a strong password means a device has to prove it knows the passphrase before it is allowed to associate, and everything it sends afterwards is encrypted. The personal mode uses Simultaneous Authentication of Equals, a key-establishment handshake built to resist password-guessing attempts, so capturing the exchange does not hand an attacker a wordlist attack the way older schemes did.
The three distractors are all obscurity measures, and each fails for the same reason: the network still announces itself to anyone listening. Hiding the network name only removes it from the friendly list, because the name still travels in frames that clients emit and scanning tools read it in seconds. Lowering the transmit power shrinks coverage a little, which inconveniences legitimate users indoors while a directional antenna outside still reaches. Changing the router's management address protects the admin page, not the radio, and a device can join the network without ever visiting that page.
Exam tip: when a wireless question asks for the most effective control, choose the authentication and encryption answer. The obscurity options exist to catch candidates who read harder to find as harder to enter.
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