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Which among the following is not an upper layer issue?(a) Channel sensing(b) Routing(c) Security(d) Congestion controlI got this question in an interview.Question is from Next Generation Wireless Network in chapter Next Generation Wireless Network of Cognitive Radio

Answer» RIGHT answer is (a) Channel sensing

The best I can explain: Upper LAYER issues are the challenges in the application layer, the transport layer, and the NETWORK layer in the implementation of cognitive radio networks. Route selection and maintenance is a challenge of the network layer. Prevention of INTRUSION is a challenge of the transport layer.


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