Sony VGN-P21S/W User Manual page 47

Using Your VAIO Computer >
Using the Wireless LAN
The IEEE 802.11a standard is a wireless LAN standard, using the 5 GHz band.
The IEEE 802.11n draft standard is a wireless LAN standard, using the 2.4 GHz or 5 GHz band.
Wireless LAN devices using the 2.4 GHz band cannot communicate with devices using the 5 GHz band because the frequencies are different.
The 2.4 GHz band used by wireless LAN compatible devices is also used by other various devices. Although technologies to minimize interference from
other devices that use the same band are employed on wireless LAN compatible devices, such interference may cause lower communication speed,
narrower communication range, or broken wireless connections.
The communication speed varies depending on the distance between communication devices, existence of obstacles between such devices, the device
configuration, the radio conditions, and the software in use. In addition, communications may be cut off depending on the radio conditions.
The communication range varies depending on the actual distance between communication devices, existence of obstacles between such devices, the
radio conditions, the ambient environment that includes existence of walls and materials of such walls, and the software in use.
Actual communication speed may not be as fast as the one displayed on your computer.
Deploying IEEE 802.11b and IEEE 802.11g products on the same wireless network may reduce the communication speed due to radio interference.
Taking this into consideration, the IEEE 802.11g products are designed to reduce the communication speed to ensure communications with
IEEE 802.11b products. When the communication speed is not as fast as expected, changing the wireless channel on the access point may increase
the communication speed.
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