WLAN FAQ

Metal or steel construction can be a barrier to radio signals.
802.11a, 802.11b, and 802.11g comparison chart:
802.11a 802.11b 802.11g Comment
First Products
Available
2001 1999 2003
802.11b is the most mature
technology
Non-Overlapping
Channels
8 3 3
802.11a allows for higher user
densities and higher system
data throughput with multiple
access points
Frequency Band
5 GHz 2.4 GHz 2.4 GHz
The 5 GHz frequency band is
less crowded and may
experience less interference
from other devices
Coverage Area
Good Better Better
5 GHz frequencies do not travel
as far as lower frequencies
Maximum Data Rate
54 Mbps 11 Mbps 54 Mbps
Higher data capacities can
handle a larger number of
users or demanding
applications such as streaming
video or large file transfers
Average Relative
Actual Data
Throughput
Best Good Better
Actual data throughput is
effected by the number of users
and environmental conditions
such as interference from other
wireless networks, building
constructions and distance
between clients and access
points
Compatibility
802.11a 802.11b
Backward
Compatible to
802.11b
Devices are available that
provide for multiple band and
802.11 mode operations
Relative Penetration
Good Better Better
Higher frequencies do not
travel through solid objects ,
such as walls, as well as lower
frequencies