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Peer networks provide ____ spectrum.

(a) temporally limited

(b) temporally unlimited

(c) spatially limited

(d) spatially unlimited

This question was posed to me in an online quiz.

My question is taken from Radio Resource Analysis in portion Software Defined Radio Architecture of Cognitive Radio

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The correct option is (c) spatially limited

The explanation is: Peer networks provide spatially limited spectrum. The nodes communicate within a spatial region defined by radio horizon. The hierarchical networks provided spatially unlimited spectrum owing to the base station infrastructure.

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