A) It is a high definition digital Broadcasting of television signals
B) It is a cheap and fast optical version of Wi-Fi
C) It is the fast Wi-Fi in which the software allows internet access without modem
D) None of the above
Correct Answer: B
Solution :
[b] Light Fidelity (Li-Fi) is a bidirectional, high speed and fully networked wireless communication technology similar to Wi-Fi. The term was coined by Harald Haas and is a form of visible light communication and a subset of optical wireless communications (OWC) and could be a complement to RF communication (Wi-Fi or Cellular network), or even a replacement in contexts of data broadcasting. It is so far measured to be about 100 times faster than some Wi-Fi implementations, reaching speeds of 224 gigabits per second.
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