Question: a) Distinguish between signature detection and anomaly detection. b) What is a zero-day attack? c) Why are zero-day attacks impossible to stop with attack signatures?

a) Distinguish between signature detection and anomaly detection.
b) What is a zero-day attack?
c) Why are zero-day attacks impossible to stop with attack signatures?
d) What is the promise of anomaly detection?
e) Why is anomaly detection becoming critical for firewalls?

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