Which of the following description of PSK authentication is wrong?

Question

Options

• APSK authentication needs to configure the same pre-shared key on the wireless client and device
• BBoth WPA and WPA2 support PSK authentication
• CThe PSK authentication process is similar to the shared key authentication process, so the security
• DPSK authentication is to verify the legitimacy of the STA side Key through 4-way handshake Key

• A
  70% (19)
• B
  7% (2)
• C
  19% (5)
• D
  4% (1)

Explanation

Option A is the wrong description because while PSK requires the same passphrase to be entered on both the client and access point, the authentication process does not directly transmit or compare the raw pre-shared key - the 4-way handshake derives and validates session keys from the PSK without ever exposing it over the air, making the description in A an oversimplification of how PSK actually functions. Option B is correct: WPA (WPA-Personal) and WPA2 (WPA2-Personal) both support PSK mode. Option C is correct in spirit - PSK differs significantly from WEP's shared key authentication in security strength, as PSK uses stronger encryption and key derivation, making them not equivalent despite superficial similarity. Option D is correct: PSK authentication uses a 4-way handshake to confirm that both the STA (station/client) and the AP can independently derive the same keys from the shared passphrase, verifying mutual knowledge of the PSK without transmitting it.

Memory tip: Think of PSK as a "derive, not expose" mechanism - the raw key never travels over the air, so any description suggesting a direct key comparison or transmission is a red flag for a wrong answer.

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