10. Definition: Intrusion Detection System (IDS) is a software to determine if a computer network or server has experienced an unauthorized intrusion.
11. IDS detects these intrusion attempts so that action may be takento repair the damage later. IDS monitors network traffic and monitors for suspicious activity and alerts the system or network administrator.
12. The beginning(History) A USAF paper published in October 1972 written by James P. Anderson outlined the fact the USAF had “become increasingly aware of computer security problems.”