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QusWhich of the following techniques does Sigfox use for communication? Qusसिगफॉक्स कम्युनिकेशन के लिए निम्नलिखित में से किस टेक्निक्स को यूज़ करता है?

A. Frequency Hopping Spread Spectrum (FHSS)
B. Ultra Narrow Band (UNB) modulation
C. Orthogonal Frequency Division Multiplexing (OFDM)
D. Carrier Sense Multiple Access (CSMA)

Solution

B. Ultra Narrow Band (UNB) modulation