@tenista 2.4Ghz travels further due to the wavelength it uses but it is prone to interferance from devices such as cordless phones, microwaves, baby monitors, garage door openers, etc. 5Ghz allows for higher throughput due to its wavelength and isn't affected by devices using the 2.4Ghz spectrum. If you are going to deploy a new network or even replace equipment becuase you are having issues I would suggest doing a wireless site survey and having a look to see what your environment is like for saturation, background noise and channel overlap.
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