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In a word, wireless site surveys are
necessary because radio wave propagation is difficult to predict,
especially in non-open space environments. Considering all the
variables that might affect the health and performance of your WLAN
is virtually impossible. Changing conditions, even something as
seemingly minor as a notebook equipped with a legacy 802.11g
adapter that your new employee connected to the office wireless
network, might seriously impact the WLAN performance. In addition,
considering the wide proliferation of wireless infrastructure,
factors such as interference from nearby WLANs play a very
important role. This is why regular site surveys conducted with a
professional tool are essential.
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