1. A method of managing utilization of network intrusion detection systems in a dynamic data center, said method comprising: providing a plurality of network intrusion detection systems, each being networked so that utilization of each network intrusion detection system can be based on demand for said network intrusion detection systems in said dynamic data center; receiving a monitoring policy and a plurality of monitoring points to be monitored on a network with any of said network intrusion detection systems; and automatically arranging the monitoring of said monitoring points using said network intrusion detection systems and said monitoring policy.