Why Did STA Fail to Search 802.11n Signals After the AP Is Enabled with 802.11n?
This is because the IEEE 802.11n draft protocol does not support a high throughput rate of the WEP or TKIP unicast ciphers. If the STA uses the WEP or WPA-TKIP encryption mode, the data transmission rate will decrease to 54 Mbit/s. In WEP or TKIP mode, if the STA uses the 802.11b/g/n NIC to associate with APs, it can only be associated with 802.11g APs. As a result, the displayed signal transmission rate is 54 Mbit/s but not the 802.11n rate. This is restricted by the IEEE 802.11 standard.