A bookstore uses a Faraday cage to comply with credit card regulations. Customers report that their cellular phones have no signal when they are in the bookstore. Which of the following is the MOST likely cause?
A.
The Faraday cage is creating interference within the bookstore.
B.
The Faraday cage prevents access by redirecting signals.
C.
The Faraday cage is creating latency on the cellular network.
D.
The Faraday cage is creating attenuation of the cellular network.
To be honest, this is more a question for Azure exam as Faraday cages are present everywhere when dealing with databses in cloud. Lucky me I`ve done that and got the connection.
Seems like it's D.
A faraday cage doesn't redirect signal, it just cancels it out.
"When electromagnetic radiation - such as a phone signal - hits the outside of a Faraday cage, it causes electrons in the metal to move and create an electromagnetic field that exactly opposes and cancels out that wavelength of radiation."
"Faraday cages can attenuate the frequency of cell phones."
It seems like it could be either or. It redirects the signal and causes attenuation. Assuming that the cell phone is not inside of the cage (which the signal is redirected away from) The cage could be causing attenuation on the outside of the cage causing the signal issue. Honestly i feel like its just a guess at this point.
I would rule out attenuation because the question states the customers have no signal at all. We can also eliminate latency and interference, leaving B the signal is being redirected or blocked.
The reception or transmission of radio waves, a form of electromagnetic radiation, to or from an antenna within a Faraday cage is heavily attenuated or blocked by the cage
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