04 RPC vs REST for real-time AI

REST versus RPC in distributed systems — REST as the resource architect (HTTP verbs, idempotency, caching) and RPC as the action specialist (interface description languages and code-generated stubs, plus the idempotency uncertainty problem). In a real-time conversational AI, the control plane uses stateless REST for session allocation and horizontal scaling, while the data plane uses WebSockets/gRPC to stream audio frames continuously without HTTP handshake overhead. Section 4 of a Software Architecture and Design of Large-Scale Systems course.