This document provides an overview of security operations centers (SOCs), including their objectives, coverage areas, tools and technologies, design considerations, data sources, and delivery models. A SOC operates 24/7 to predict and minimize the impact of security attacks, implement security policies enterprise-wide, and reduce security costs through centralized remote support. It aims to protect against threats proactively, enable quick recovery, and ensure breach readiness and compliance. A SOC monitors perimeter devices, networks, systems, applications, and data using tools like SIEM, vulnerability management, and security orchestration. It addresses the cyber kill chain by actively responding to attackers. Organizations must decide whether to build an in-house SOC, use a managed security service provider