Which of the following is designed to identify malicious attempts to penetrate systems?

A.
Intrusion Detection System

B.
Firewall

C.
Proxy

D.
Router

Explanation:
An intrusion detection system (IDS) is a device or software application that monitors network or system
activities for malicious activities or policy violations and produces electronic reports to a management station.
https://en.wikipedia.org/wiki/Intrusion_detection_system