Interference can come from more than just other 802.11 network
Pre-deployment RF sweeps detect all interference sources
Interference's impact on a wireless LAN can be significant
Cisco's paper tackles several other issues as well, in a format that briefly states the commonly held myth then goes into detail refuting it. Among the myths addressed in the paper:
My network seems to be working, so interference must not be a problem.
I can overcome interference by having a high density of access points.
There is no interference at 5 GHz.
Interference is not a security risk.
The white paper, as well as Carter's upcoming article, impress upon the reader that RF analysis tools are necessary for complete interference detection.
