1> Speed can fluctuate significantly.
2> There is a problem in selection of frequency.
3> If the range of radio signal is less then ,one should have to put repeater and amplifier in between.
4> Wi-Fi works on radio signal. It is not provide user privacy because any simple radio receiver can receive the radio signals. So there should be tight security for it unlike wired network.
5> There will be a problem of multi path fading.
6> Collision avoidance is the big issue for it.
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