Why cannot a STA associate with an AP when the radio type is set to pure 802.11n and the encryption mode is set to TKIP

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TKIP is insecure, so 802.11n does not support TKIP encryption.

Other related questions:
When the radio type of the AR router is set to pure 80211.11n and the encryption mode is set to TKIP, why does the wireless device fail to connect to the AP
TKIP is insecure, so 802.11n does not support TKIP encryption. When the radio type is set to pure 802.11n, the following encryption modes are supported: -open -wpa-psk ccmp -wpa2-psk ccmp -wapi -wpa dot1x ccmp -wpa2 dot1x ccmp

When the radio type of the AR router is set to pure 802.11n and the encryption mode is set to WEP, why does the wireless device fail to connect to the AP
WEP is insecure, so 802.11n does not support WEP encryption. When the radio type is set to pure 802.11n, the following encryption modes are supported: -open -wpa-psk ccmp -wpa2-psk ccmp -wapi -wpa dot1x ccmp -wpa2 dot1x ccmp

Why does a STA fail to associate with an AP when WEP and TKIP encryption is configured in 802.11n mode
The 802.11n does not define the WEP or TKIP encryption mode. When the two encryption modes are used, STAs may fail to associate with the AP.

Why cannot STAs associate with an AP when WEP authentication is used
The possible causes are as follows: - No WEP SSID is added to the STA. Many STAs associate with WEP SSIDs by using encryption without authentication. However, the AP uses both authentication and encryption. Therefore, the STA cannot associate with the SSID. The SSID must be manually configured on the STA. At last, set the encryption type to share mode. - The key index configured on the AP is different from the key index on the STA. By default, the key index of an AP is 0 (ranging from 0 to 3), and the key index of STA is 1 (ranging from 1 to 4). Key index 0 on the AP matches key index 1 on the STA.

Why cannot STAs associate with an AP when WPA-PSK authentication is used
The possible causes are as follows: - The AC's interface connecting to the switch or AP is not added to service VLANs. During the authentication, keys need to be exchanged through the service channel; therefore, the interfaces must be added to service VLANs. - The STA does not support WPA2-PSK. For example, the computer runs an early version of Windows XP without patches installed, the computer may not support WPA2-PSK. Patches need to be installed on the computer.

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