What looks for people on the network who shouldn't be there or who are acting suspiciously?

What looks for people on the network who shouldn't be there or who are acting suspiciously? Correct Answer Intrusion‐detection software

Intrusion‐detection software looks for people on the network who shouldn't be there or who are acting suspiciously. An intrusion detection system is a device or software application that monitors a network or systems for malicious activity or policy violations.

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