Which authentication uses a null method and allows a device to associate with an AP via cleartext transmission?

Which authentication uses a null method and allows a device to associate with an AP via cleartext transmission?

• A. Open system authentication process
• B. Shared key authentication
• C. 802.1X authentication
• D. WEP

Answer: (A)

In 802.11, the option that uses a null method for authentication is Open System authentication. This approach does not require any credentials or challenge-response exchange; a device can simply attempt to associate with the access point. Because there’s no authentication verification involved, the initial association frames can be transmitted in cleartext unless encryption (like WEP/WPA) is applied afterward. Why this fits: Open System authentication literally uses a “no authentication” method, so no secret key or server-based check is involved. The other options involve active authentication steps or are focused on encryption rather than authentication: Shared Key authentication uses a challenge with a shared WEP key; 802.1X authentication relies on an authentication server and an EAP exchange; WEP is an encryption protocol, not an authentication method.

In 802.11, the option that uses a null method for authentication is Open System authentication. This approach does not require any credentials or challenge-response exchange; a device can simply attempt to associate with the access point. Because there’s no authentication verification involved, the initial association frames can be transmitted in cleartext unless encryption (like WEP/WPA) is applied afterward.

Why this fits: Open System authentication literally uses a “no authentication” method, so no secret key or server-based check is involved. The other options involve active authentication steps or are focused on encryption rather than authentication: Shared Key authentication uses a challenge with a shared WEP key; 802.1X authentication relies on an authentication server and an EAP exchange; WEP is an encryption protocol, not an authentication method.