Destination unreachable administratively prohibited messages can inform the hacker to what?

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Accepted Answer

D. That a router or other packet-filtering device is blocking traffic

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A. That a circuit level proxy has been installed and is filtering traffic

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B. That his/her scans are being blocked by a honeypot or jail

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C. That the packets are being malformed by the scanning software

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E. That the network is functioning normally

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