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What is SIEM? SIEM is the combination of two different types of products, SIM (Security Information Management) that gathers and creates reports from security logs and SEM (Security Event Manager) that uses event correlation and alerting to help with the analysis of security events.
SIEM requires an intimate understanding of the network topology and protocols by the security team, not just the IT and network engineers. It also requires a clear understanding of what it is the SIEM system is expected to accomplish. SIEM is really logging and monitoring, Bhatia says.