Answer:
An intrusion detection system is a device, or software application that monitors a network or systems for malicious activity or policy violations. Any intrusion activity or violation is typically reported either to an administrator or collected centrally using a security information and event management system
Step-by-step explanation:
The definition of an intrusion is an unwelcome interruption or a situation where somewhere private has an unwelcome visit or addition. When you are having a quiet nap in your backyard and your neighbor's dog comes in uninvited and jumps all over you to wake you up, this is an example of an intrusion.
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