A large organization has gone through several mergers, acquisitions, and de-mergers over the past decade. As a result, the internal networks have been integrated but have complex dependencies and…

Service-oriented architecture is an architectural design philosophy that describes how services should be structured, not a concrete integration platform that provides event-driven messaging infrastructure.

Federated identities address cross-organizational identity and access management but provide no capability for application data integration or event routing.

An Object Request Broker enables distributed object-to-object communication but lacks the event-driven routing, protocol mediation, and transformation capabilities required for enterprise-scale integration.

An ESB provides a centralized, event-driven messaging backbone that uses open standards to route, transform, and mediate communication between heterogeneous systems, directly abstracting the complex dependencies that accumulate during mergers. It decouples applications so that integrations can be simplified and secured without requiring changes to each underlying system.