asherman13 said:
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1. What is Interference Robustness, and why should/shouldn't I use it?
It adds additional error checking and repairing/resending routines to your wireless connection to help eliminate or minimize intermittent interference by cordless phones, microwaves, third-rail trains, etc... It can reduce through-put.
asherman13 said:
2. Does enabling security on a wireless network decrease its range/signal strength?
Thanks!
No, but reducing the output power/radius of the base-station is a way of providing better security by reducing the area that your signal can effectively be detected and used.
While using WPA won't reduce the radius of the signal, it may slow down and cause some kinds of streams to become stilted to down grade because decrypting and encrypting the information back and forth (mostly down stream) can be taxing on your system. If you’re running into problems try dumming down your security (if you’re not too worried- I'm not). I think that it also affects the lag on AirTunes.
If you click on the Finder and then select Apple Help, it should cover this in some form.