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Why is infrared generally considered to be more secure …

Why is infrared generally considered to be more secure to eavesdropping than multidirectional radio
transmissions?

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A.
Because infrared eavesdropping requires more sophisticated equipment.

B.
Because infrared operates only over short distances.

C.
Because infrared requires direct line-of-sight paths.

D.
Because infrared operates at extra-low frequencies (ELF).

Explanation:
Infrared communications require line-of-sight transmission. This makes infrared relative secure from electronic
eavesdropping.
Incorrect Answers:
A: Infrared eavesdropping does not require more advanced transmissions.
B: Infrared operates over short distances, but this is not the main reason it is hard to eavesdrop. Compared to
multidirectional radio transmission a direct line of sight is necessary.
D: Infrared operates at high frequencies around 430 THz.


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