Wi-Fi Protected Access

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Wi-Fi Protected Access (also known as WPA and WPA2) is the name for a number of standards to use encryption on a Wireless LAN. The standards were created because researchers had found several weaknesses in Wired Equivalent Privacy. Wired Equivalent Privacy, or WEP was the standard that came before it. The protocol WPA2 implements most of the standard IEEE 802.11i.

Products that have the label WPA were designed to work with most cards, even those that came out before there was WPA. This is not true for access points though.

Products with the WPA2 implement all of the standard. This is more secure, but it may not work with some older cards.