What does IDS stand for in network security?

• A. Intrusion Detection System.
• B. Internet Data Service.
• C. Internal Defense System.
• D. Information Detection System.

Answer: (A)

An intrusion detection system watches network and host activity to spot signs of unauthorized access or policy violations, and it raises alerts for investigation. This is the standard meaning of IDS in network security, focusing on detecting and signaling potential threats so defenders can respond. It can be network-based or host-based and may use signature-based or anomaly-based techniques to identify malicious activity. The other terms aren’t established names for this function—Internet Data Service, Internal Defense System, or Information Detection System aren’t recognized security technologies for this purpose.