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Which among the following is a requirement of a cognitive mesh network?

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Which among the following is a requirement of a cognitive mesh network?

(a) Large spectrum

(b) Quality of service

(c) Security

(d) Effective modulation scheme

This question was posed to me in examination.

My doubt is from The xG Network Architecture topic in division Next Generation Wireless Network of Cognitive Radio

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Correct choice is (a) Large spectrum

Explanation: Cognitive mesh networks require high capacity to support applications that require high throughput. xG networks are capable of accessing large portions of the spectrum and can support the demand generally present in dense urban areas. Cognitive mesh networks are used for providing broadband connectivity.

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