300-430 Question 280
Select 3A network engineer is troubleshooting a wireless client that is unable to connect to the corporate SSID. The client device receives an IP address from the DHCP server, but it cannot ping the default gateway. Which of the following steps should be taken to resolve the issue?
- A
Verify the VLAN configuration on the wireless LAN controller (WLC).
- B
Check the client device's wireless adapter for compatibility with the corporate SSID security settings.
- C
Ensure that the access point (AP) is broadcasting the correct SSID.
- D
Inspect the RADIUS server logs for failed authentications.
- E
Verify that the client device is using the correct DNS server settings.
Show answer and explanation
Correct answers: A, B, C
Explanation
The issue described indicates that the client is unable to route traffic to the default gateway despite receiving an IP address. This suggests a problem with network configuration, SSID settings, or wireless client compatibility. Verifying the VLAN configuration on the WLC, checking the wireless adapter compatibility, and ensuring the correct SSID is broadcast are critical troubleshooting steps for resolving this connectivity issue.
- A. Correct.
The VLAN configuration on the WLC determines which subnet is assigned to the wireless client. If the VLAN is misconfigured, the client may not be able to properly route traffic to the default gateway.
- B. Correct.
The client device's wireless adapter must support the security settings (e.g., WPA2-Enterprise) configured for the corporate SSID. A mismatch can cause connectivity issues.
- C. Correct.
If the access point is not broadcasting the correct SSID, the client device may connect to the wrong network or fail to connect entirely.
- D. Incorrect.
Inspecting the RADIUS server logs is not relevant in this scenario because the client is already receiving an IP address, indicating that authentication has likely succeeded.
- E. Incorrect.
DNS server settings do not affect the client’s ability to ping the default gateway. This setting is more relevant to resolving domain names.