Yes , check for version of Wireless lancard you are using . It might be 802.11B version.
The 802.11a standard operates in 5 GHz band with a maximum raw data rate of 54 Mbit/s. The range of 802.11a wireless networking equipment is slightly less than that of 802.11b/g because the signals are easily absorbed by walls and other solid objects.
The 802.11b standard operates in the 2.4 GHz band and has a maximum raw data rate of 11 Mbit/s. 802.11b devices suffer interference from other products (such as microwave ovens, Bluetooth devices and cordless telephones) that also operate in the 2.4 GHz band.
The 802.11g standard operates in the 2.4 GHz band, like 802.11b, but operates at a maximum raw data rate of 54 Mbit/s. Devices based on the 802.11g standard are fully backward compatible with 802.11b hardware.
The 802.11n standard operates in the 5 GHz and/or the 2.4 GHz band. Devices in the 802.11n standard include MIMO technology.
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