N10-005 · Question #754
Joe, a vendor, walks into a customer's site with a laptop. While waiting for his contact to arrive, he wants to check his email. He discovers the SSID for the site's wireless network and receives a…
The correct answer is B. The wireless router at the customer's site is configured with MAC filtering. MAC filtering (B) is the most likely cause. Joe has the correct SSID and a valid password, so encryption (WPA or WEP) is not the barrier - if the password were wrong, the connection would fail at the authentication step, not before. MAC filtering checks the device's hardware…
Question
Joe, a vendor, walks into a customer's site with a laptop. While waiting for his contact to arrive, he wants to check his email. He discovers the SSID for the site's wireless network and receives a valid guest password from the receptionist. He is, however, unable to connect. Which of the following is MOST likely the problem?
Options
- AThe customer's wireless router uses WPA encryption.
- BThe wireless router at the customer's site is configured with MAC filtering.
- CThe customer's WAP uses WEP encryption.
- DThe customer's IT department blocks all visitors from connecting to their network.
How the community answered
(32 responses)- A13% (4)
- B78% (25)
- C6% (2)
- D3% (1)
Explanation
MAC filtering (B) is the most likely cause. Joe has the correct SSID and a valid password, so encryption (WPA or WEP) is not the barrier - if the password were wrong, the connection would fail at the authentication step, not before. MAC filtering checks the device's hardware MAC address against a pre-approved list before allowing connection, regardless of whether the user has correct credentials. Since Joe's laptop was never registered, it is blocked at the MAC level. Options A and C (WPA/WEP encryption) would not block him if he has the correct password. Option D is vague and less specific than the technical control described in B.
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