What is an effective countermeasure against wireless sniffing?

Question

Options

• AUsing strong encryption protocols like WPA3
• BEmploying MAC address filtering
• CSetting up hidden SSIDs
• DRegular password changes

• A
  89% (16)
• B
  6% (1)
• D
  6% (1)

Explanation

Strong encryption like WPA3 directly defeats wireless sniffing by making intercepted packets unreadable to an attacker - even if traffic is captured, it cannot be decrypted without the key. This is why A is correct: encryption neutralizes the threat at its core.

The distractors fail because they address different attack surfaces. B (MAC filtering) only controls which devices join the network, not whether traffic in transit can be read by a passive observer. C (hidden SSIDs) is security through obscurity - the network is still discoverable with basic tools and traffic is still unencrypted. D (regular password changes) reduces the window of exposure from a compromised credential but doesn't protect actively transmitted data from being sniffed and decoded.

Memory tip: Think of sniffing as eavesdropping on a conversation - only encoding the message (encryption) stops the eavesdropper; hiding the room number (SSID), changing the door code (password), or checking IDs at the door (MAC filtering) all leave the actual conversation audible.

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