What is an Agent? What is an Agent? A host-based intrusion detection and prevention program that monitors and analyzes activity and may also perform prevention actions. Related Resources Product Omnis CyberStream and Omnis Cyber Intelligence NDR Platform Faster, Smarter Incident Response Starts with the Right Data. Learn more Blog ASERT NETSCOUT’s network security experts provide world-class cyber security research and threat analysis for the benefit of today’s enterprise and network operators. Learn more