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Military applications need __________ in addition to mobile subscriber sets.

(a) fixed infrastructure

(b) mobile infrastructure

(c) partitioned infrastructure

(d) parted infrastructure

The question was posed to me in class test.

Question is from Architecture Evolution topic in chapter Architecture Evolution of Cognitive Radio

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Right answer is (b) mobile infrastructure

Best explanation: Commercial applications are supported by fixed infrastructure such as cell phone towers and base stations. However such facilities are not available for military application. Thus, a mobile infrastructure is required.

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