300-430 Question 130
Select 4A network administrator is troubleshooting a client device that is unable to connect to the corporate wireless network. Upon reviewing the wireless controller logs, the administrator notices that the client's authentication request is being denied. The corporate wireless network uses WPA2-Enterprise with 802.1X authentication. Which of the following steps should the administrator take to resolve the issue?
- A
Verify the client's username and password are correctly entered.
- B
Check if the client's wireless adapter supports WPA2-Enterprise.
- C
Confirm that the RADIUS server is reachable from the wireless controller.
- D
Ensure the client device is configured to use the correct pre-shared key.
- E
Validate that the client has the required digital certificate installed.
Show answer and explanation
Correct answers: A, B, C, E
Explanation
WPA2-Enterprise with 802.1X relies on authentication mechanisms involving usernames, passwords, and potentially digital certificates. To resolve the issue, the administrator should verify the client's credentials, ensure the wireless adapter supports WPA2-Enterprise, check the connectivity between the wireless controller and the RADIUS server, and confirm the client has the necessary digital certificate. A pre-shared key is not relevant in this scenario, as it is used for WPA2-Personal, not WPA2-Enterprise.
- A. Correct.
If the username or password is incorrect, the authentication request will fail. This is a common issue with 802.1X authentication.
- B. Correct.
If the client's wireless adapter does not support WPA2-Enterprise, it will be unable to authenticate to the wireless network.
- C. Correct.
The RADIUS server must be reachable by the wireless controller for 802.1X authentication to succeed. Network connectivity or configuration issues between these components can cause failures.
- D. Incorrect.
A pre-shared key is not used in WPA2-Enterprise authentication. This option is irrelevant to the scenario.
- E. Correct.
WPA2-Enterprise with 802.1X authentication often requires a digital certificate for mutual authentication. If the client does not have the required certificate, the authentication will fail.