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An intrusion detection system (IDS) is a device or software application that monitors a network for malicious activity or policy violations. Any malicious activity or violation is typically reported or collected centrally using a security information and event management system.

Using a fully-fledged IDS from top brands such as Texcom & Pima etc. as part of your security system is vital and is intended to apply across your entire network in different ways, IDS security works in combination with authentication and authorization access control measures, as a double line of defense against intrusion.