Glossary
Operating Instructions SCALANCE W78x
C79000-G8976-C184-07
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in compliance to the 802.11b standard.
The Wi-Fi Alliance also develops standards. The WiFi Alliance has
developed its own architectures for security procedures that have not
yet been standardized such as the WiFi Protected Architecture (WPA)
to be able to test the compatibility of the various manufacturers'
products.
For real-time transmission, the Wi-Fi Alliance has specified Wi-Fi
Multimedia (WMM) for transmissions with guaranteed quality of
service (QoS).
WMM
Wi-Fi Multimedia
WPA
WPA (Wi-Fi Protected Access) is a method specified by the Wi-Fi
Alliance to close security gaps in WEP. Authentication using a server
is stipulated (802.1x). The dynamic exchange of keys at each frame
introduces further security. As the encryption method, you can choose
between TKIP (Temporal Key Integrity Protocol) and AES (Advanced
Encryption Standard).
Although WPA never became an official component of the IEEE
802.11 family of standards, it has become very widespread in a short
time. This, however, applies only to the WPA procedure described
above using TKIP. The optional possible implementation of WPA on
the basis of AES, on the other hand, did not become established and
is therefore irrelevant in everyday practice. AES only took on practical
value only with the development of the later WPA2 standard.
WPA-PSK
WPA-PSK is a weakened form of WPA. In this method, authentication
is not established by a server but is based on a password. This
password must be configured manually on the client and server.
Wherever possible, you should change to the WPA method to achieve
greater security.
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