Common integration patterns include: Point-to-point integration: Direct integration between two systems. Hub-and-spoke integration: Centralized hub system connects and manages interactions between multiple systems. Message-oriented middleware: Systems communicate through messages exchanged via a middleware layer. Service-oriented architecture (SOA): Systems expose services that can be consumed by other systems using standard protocols like SOAP or REST. Event-driven architecture (EDA): Systems interact and exchange data based on events and triggers.