Sony VGN-BX500 - Manual (Page 55)

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Using Your VAIO Computer
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WLAN uses the IEEE802.11b/g standard, which specifies the used technology. The standard includes the encryption method: Wired Equivalent Privacy
(WEP), which is a security protocol and WiFi Protected Access (WPA - Proposed jointly by the IEEE and Wi-Fi Alliance, WiFi Protected Access is a
specification of standards based, interoperable security enhancements that increase the level of data protection and access control for existing WiFi
networks. WPA has been designed to be forward compatible with the IEEE802.11i specification. It utilizes the enhanced data encryption TKIP (Temporal
Key Integrity Protocol) in addition to user authentication using 802.1X and EAP (Extensible Authentication Protocol)). Data encryption protects the
vulnerable wireless link between clients and Access Points. Besides that, there are other typical LAN security mechanisms to ensure privacy, such as:
password protection, end-to-end encryption, virtual private networks, and authentication.
Wireless LAN devices using the IEEE802.11a standard and the ones using the IEEE802.11b or g standard cannot communicate because the frequencies
are different.
IEEE802.11b: The standard speed is 11 Mbps, or about 30 to 100 times faster than a standard dial up.
IEEE802.11a/g: The standard speed is 54 Mbps, or about 5 times faster than a Wireless LAN device using the IEEE802.11b standard.