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Advanced threat detection (ATD) is a type of security that goes beyond basic security analysis. It is built into "appliances" and other solutions that work on a deeper level to fix security vulnerabilities and prevent cyberthreats.
In IT, ATD is not the kind of branded security product that is trademarked in the home security industry. It is a broad-level term for solutions that use certain kinds of analysis to boost security in systems. For example, ATD tools may use elements like source reputation to analyze network traffic for security purposes. They may work across multiple operating systems or otherwise develop "rich threat intelligence" that gives the human security teams a better view of where systems are vulnerable. Advanced threat detection tools may analyze downloads or other user activity within the system. They may analyze the use of internal alerts to pinpoint how cyberthreats apply to the system. Vendor tools can help companies improve their security by bringing this type of deeper level analysis to networks.