Managed Detection and Response Services (MDRS) offer enhanced security capabilities compared to traditional Managed Security Service Providers (MSSPs) by focusing on deeper infrastructure monitoring and threat response with tools like Elastic XDR and Corelight. Elastic's platform integrates security information and event management (SIEM) and endpoint security, providing a unified solution for prevention, detection, investigation, and response. Corelight enhances network security monitoring by leveraging Zeek to transform network traffic into actionable metadata. For deploying Elastic's solution, options include self-managed or fully managed Elastic Cloud, with considerations for dedicated versus shared clusters to maintain performance and security. Architecture best practices for MDRS include segregating customer environments for better scalability and using cross-cluster search for centralized rule management. The integration of Corelight data with Elastic empowers threat hunting and investigation while maintaining cost efficiency. Elastic's recent licensing changes impact the provision of its products as managed services, and further details are available in their licensing FAQs.