What is one thing&#8

What is one thing you should be aware of when conducting a wireless site survey？（）

A 5 GHz equipment will not be able to penetrate through walls as well as 2.4 GHZ equipment.
B 2.4 GHz equipment will not be able to penetrate through walls as well as 5 GHz equipment.
C Mounting antennas near metal objects will slightly amplify the signal.
D When determining coverage， you should begin measuring attenuation from the middle of the room.

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