Data Rate Will Not Exceed 54 Mbps in WEP and TKIP

Data Rate Will Not Exceed 54 Mbps When WEP or TKIP Encryption is Configured

http://www.intel.com/support/wireless/wlan/4965agn/sb/cs-025643.htm

Intel® Wireless WiFi Link 4965AGN
Data Rate Will Not Exceed 54 Mbps When WEP or TKIP Encryption is Configured

Symptom(s):
Client device's wireless data rate will not exceed 54 Mbps when WEP or TKIP encryption is configured.
Cause:

The IEEE* 802.11n Draft prohibits using High Throughput with WEP or TKIP as the unicast cipher. If you use these encryption methods (e.g. WEP, WPA-TKIP), your data rate will drop to 54 Mbps. The Intel® Wireless WiFi Link 4965AGN client driver connects using a legacy IEEE 802.11g connection rather than failing to connect altogether, which complies with the IEEE 802.11n draft.

Solution:

Contact your wireless access point (AP) or router manufacturer to download the latest firmware version, or to obtain information on particular models supporting High Throughput.
Disable 'packet bursting' or similar feature that may be enabled on the AP or router.
Configure the wireless client device's profile to use WPA2-AES or WPA2-TKIP. You may also choose to configure an unsecured profile, but this option is NOT recommended.
Configure the AP or router to match the client profile.