An intrusion detection system monitors network traffic for policy violations and suspicious activity, alerting when such activity is found. It can detect anomalies and malicious traffic to catch hackers before they damage networks. The system reports and collects information about any harmful activity or violations, and some are capable of responding automatically to detected intrusions for added network security and protection.

1. INTRUSION DETECTION SYSTEM
Intrusion detection is a device or software application that monitors network
traffic for policy violations or suspicious activity and alerts when such activity is
discovered. When malicious activity or anomalous traffic is detected, some
are capable of taking actions against it.Intrusion
intrusion detection system
detection system blocking traffic sent from suspicious Internet Protocol
addresses. To detect anomalies with the aim of catching hackers before they do
real damage to a networks, intrusion detection systems used. Security
information and event management system used to report or collect any
malicious activity or violation. Some intrusion detection systems are capable of
responding to detected intrusion upon discovery. Networked business
environments require a high level of security to ensure safe and trusted
communication of information between various administrations. Intrusion
detection system acts as an adaptable safeguard technology for system security if
any traditional technologies fail