An intrusion-detection system (IDS) is a software-based tool used to detect for crackers or other security breaches such as incoming shellcodes, viruses or trojan horses in a computer system or network.
Two main types of intrustion detection system exists:
... and established a colony on Hispaniola
James Cook, (1728-1779), explored the Pacific, discovering or mapping many lands and islands
Hernan Fernando Cortes, conquered ...