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802.11g++
FRITZ!Box SL WLAN – 5 WLAN – Wireless Local Area Networks 43
802.11g++
Mit der Erweiterung 802.11g++ kann die Übertragungsge-
schwindigkeit innerhalb von WLANs erhöht werden. Brutto
sind bis zu 125 Mbit/s möglich, netto kann eine Übertra-
gungsgeschwindigkeit bis zu 35 Mbit/s erreicht werden.
IEEE 802.11i
Mit dem Standard IEEE 802.11i wird der Sicherheitsmecha-
nismus WPA2 definiert. WPA2 ist eine Erweiterung des be-
kannten Sicherheitsmechanismus WPA (Wi-Fi Protected Ac-
cess).
Die Erweiterung von WPA zu WPA2 zeichnet sich im Wesentli-
chen durch das Verschlüsselungsverfahren AES-CCM aus:
z Der WPA-Mechanismus sieht für die Verschlüsselung
das Verfahren TKIP (Temporary Key Integrity Protocol)
vor.
z Im WPA2-Mechanismus ist zusätzlich zu TKIP das Ver-
schlüsselungsverfahren AES-CCM definiert, das auf
dem sehr sicheren Verfahren AES (Advanced Encryption
Standard) basiert. Durch CCM (Counter with CBC-MAC)
wird festgelegt, wie das AES-Verfahren auf WLAN-Pake-
te angewendet wird.
FRITZ!Box SL WLAN unterstützt mit dem WPA2-Mechanismus
das Verschlüsselungsverfahren AES und mit dem WPA-Me-
chanismus das Verschlüsselungsverfahren TKIP. Somit kann
die FRITZ!Box SL WLAN zusammen mit WLAN-Adaptern be-
nutzt werden, die ebenfalls WPA2 mit AES oder WPA mit TKIP
unterstützen.
43


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