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I enabled a guest network on the 2.4 Ghz band some time ago, but I find I don't really use it much. It seems like when guest mode is enabled, it broadcasts separate SSIDs on the same channel. Will the fact that there are separate SSIDs on the same channel cause some interference, and in doing so reduce the range of my wifi?
That should only be a problem if two routers are broadcasting too close to each other on the same frequency. Since they are being broadcast by one router it shouldn't make a difference.
You could always test it out. It's not difficult to turn on and off.