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WiFi – Technische informatie
FRITZ!Box 5490 89
De uitbreiding van WPA naar WPA2 kenmerkt zich vooral door
de versleutelingsmethode AES-CCMP:
FRITZ!Box ondersteunt met het WPA2-mechanisme de ver-
sleutelingsmethode AES en met het WPA-mechanisme de ver-
sleutelingsmethode TKIP. Zo kan de FRITZ!Box samen met Wi-
Fi-apparaten worden gebruikt die eveneens WPA2 met AES of
WPA met TKIP ondersteunen.
Frequentiebereiken
Als overdrachtsbereik gebruikt WiFi de frequentiebereiken bij
2,4 GHz en 5 GHz.
Met de FRITZ!Box 5490 kunt u in beide frequentiebereiken ge-
lijktijdig WiFi-verbindingen tot stand brengen.
2,4 GHz-frequentieband
WiFi werkt in het 2,4 GHz-bereik in hetzelfde bereik als Blue-
tooth, magnetrons en diverse andere apparaten zoals radio-
grafisch bestuurbaar speelgoed, garagedeuropeners en vi-
deolinks. Binnen WiFi-netwerken die in de buurt van deze ap-
paraten worden gebruikt, kunnen daarom storingen optre-
den. Normaal gesproken wordt daardoor de
transmissiesnelheid beperkt. Er kunnen ook onderbrekingen
in de verbinding optreden.
Een kanaal kan een bandbreedte van 20 MHz (transmissie-
snelheid tot 216 Mbit/s) of 40 MHz (transmissiesnelheid tot
450 Mbit/s) hebben.
Mechanisme Versleuteling
WPA TKIP (Temporary Key Integrity Protocol)
WPA2 TKIP
AES-CCMP
gebaseerd op de zeer veilige methode
AES (Advanced Encryption Standard).
Door CCMP (Counter with CBC-MAC Proto-
col) wordt vastgelegd hoe de AES-metho-
de op WiFi-pakketten wordt toegepast.
89


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