MSSP (Managed Security Service Provider)
Definition
An MSSP is an external service provider that delivers cybersecurity monitoring and management as an ongoing service.
MSSP services typically include: 24/7 log and event monitoring, firewall and IDS/IPS management, vulnerability management, and incident response.
Difference from MDR: MSSP is traditionally reactive (monitor and report); MDR is proactive (actively hunt and stop threats).