Fritz! Box 7490 Installation And Operation Manual page 106

Wireless LAN—Getting Technical
IEEE 802.11a
Because this standard works exclusively in the seldom used
5-GHz range, it offers the opportunity to transmit data rela-
tively free of interference from external influences. Wireless
devices that support 802.11a are much less common than
devices that work in accordance with the 802.11b/g stan-
dard.
IEEE 802.11b
With a maximum throughput rate of 11 Mbit/s, this is the old-
est wireless standard. Older wireless devices of the first gen-
eration can communicate with the FRITZ!Box using 802.11b.
However, if the wireless device supports newer standards
such as 802.11g, the latest standard should be used.
IEEE 802.11g
In this wireless LAN standard data are transmitted in the 2.4-
GHz range at a maximum gross throughput of 54 Mbit/s. This
standard is compatible with a wide range of wireless devices.
However, due to heavy use of the 2.4-GHz range, interference
is more common than in the less-used 5-GHz range.
IEEE 802.11n
This standard allows for high throughput rates and ranges.
The FRITZ!Box supports 802.11n in the 2.4-GHz frequency
band, and parallel in the 5-GHz frequency band. Modulation
processes and antenna techniques like MIMO (Multiple In-
put, Multiple Output) use whichever frequency band is avail-
able more effectively than the older standards.
The use of the 802.11n standard—and thus the availability
of higher throughput rates—is possible only if the wireless
LAN connection is secured using the WPA2 security mecha-
nism (AES-CCMP).
Thanks to compatibility with the 802.11g standard, you can
also continue to use older wireless devices.
FRITZ!Box 7490 106