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Which of the following does not extend from military application to commercial application?

(a) Carrier Sense Multiple Access

(b) Frequency Hopping

(c) Direct Sequence Spread Spectrum

(d) Emitter Location

The question was posed to me by my school teacher while I was bunking the class.

I want to ask this question from Architecture Evolution topic in chapter Architecture Evolution of Cognitive Radio

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The correct option is (a) Carrier Sense Multiple Access

The best explanation: Frequency hopping, direct sequence spread spectrum, demand-assigned multiple access, variable data rates are some techniques which have extend from military application to commercial application.

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