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WPA(Wi-fi protected access) is basically a replacement for WEP.

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Posted by Hash007

WPA is used for security purpose of WiFi

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Posted by HamidAliKhan

Wi-Fi Protected Access (WPA ) is a certification program administered by the Wi-Fi Alliance to indicate compliance with the security protocol created by the Wi-Fi Alliance to secure wireless computer networks. This protocol was created in response to several serious weaknesses researchers had found in the previous system, Wired Equivalent Privacy (WEP). However, researchers discovered a flaw in 2008 that relied on older weaknesses to retrieve the keystream from short packets to use for re-injection and spoofing.[1] The protocol implements the majority of the IEEE 802.11i standard, and was intended as an intermediate measure to take the place of WEP while 802.11i was prepared. Specifically, the Temporal Key Integrity Protocol (TKIP), was brought into WPA. TKIP could be implemented on pre-WPA wireless network interface cards that began shipping as far back as 1999 through firmware upgrades. Because the changes required fewer modifications on the client than on the wireless access point, most pre-2003 APs could not be upgraded to support WPA with TKIP.

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Posted by jamz

Wi-Fi Protected Access:
WPA aims to provide stronger wireless data encryption than WEP, but not everyone has or was able to jump onboard with the new wireless encryption technology. In order to use WPA all devices on the network must be configured for WPA. If a device is not configured for WPA, it will usually fall back to the lesser WEP encryption scheme, enabling the wireless devices to communicate on the network.

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Posted by sagitraz