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Which among the following are sources for constructing an IP database?

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Which among the following are sources for constructing an IP database?

(a) Network routing information

(b) Data mining

(c) Regional Internet registry

(d) Data scrubbing

I had been asked this question in an interview for internship.

This interesting question is from Next Generation Wireless Network in chapter Next Generation Wireless Network of Cognitive Radio

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Correct answer is (d) Data scrubbing

For explanation: The primary source of the IP address database is the regional internet registries that assign the IP addresses to organizations within their service area. Network routing information extracted at the endpoint of an IP address, data mining, and data provided by Internet Service Providers are useful for constructing the IP database.

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