The AppDynamics architecture is built around four main components: Agents, Controller, Events Service, and Dashboard. Agents are lightweight modules installed on application servers, databases, or end-user devices to collect performance data. The Controller acts as the central brain, processing and storing this data for visualization. The Events Service handles large volumes of event data and analytics, while the Dashboard provides customizable views for monitoring system health and KPIs. Together, they create a seamless monitoring environment that connects infrastructure to business transactions. This modular yet integrated design allows AppDynamics to scale easily across multiple environments, from on-premises servers to modern cloud platforms.