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Intrusion Detection System (IDS)

Security

A tool that watches for suspicious activity and alerts you.

Definition

An IDS monitors network or system activity and warns you about suspicious behavior.

In plain English A tool that watches for suspicious activity and alerts you.

Why this matters

Why it matters: Early detection can stop a breach before more data is stolen.

Example

Example: An IDS alerts when a server suddenly scans many ports or has unusual login attempts.