Intrusion Prevention Systems are designed to protect information systems from unauthorized access, damage or disruption. Vendors have developed IPS to counteract the rapidly evolving threats presented by the latest generation of worms, software and network exploits. As the number and frequency of threats has increased, the increasing complexity of the network environment has made mitigation of these threats harder to achieve. This paper addresses the need for Intrusion Prevention Systems, explores the two most popular IPS architectures and provides insight into the selection and use of these systems.
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