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Security Operations · Foundational

Managed Security Service Provider (MSSP)

A third party that delivers outsourced security monitoring and management services.

Definition

MSSPs typically manage firewalls, IDS/IPS, SIEM monitoring and vulnerability scanning for multiple customers, often alerting the customer to take action. Contracts and SLAs define responsibilities, response times and data handling. They suit organizations lacking in-house 24x7 staff.

Example

A mid-size firm outsourcing SIEM log monitoring to an MSSP that emails alerts.

Exam tip

MSSP often notifies; MDR actively investigates and responds.

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