The rapid expansion of the Internet of Things (IoT) has accelerated the demand for scalable, flexible, and secure network architectures. Traditional TCP/IP networks face limitations in handling the dynamic and large-scale traffic patterns generated by IoT devices, particularly in terms of scalability, Quality of Service (QoS), and security. This paper presents an integrated approach that leverages the Recursive Internetwork Architecture (RINA) and Software-Defined Networking (SDN) to design scalable networks capable of efficient IoT integration. By combining RINA's recursive, flexible layering with SDN's centralized control and programmability, we propose a robust solution to address the key challenges posed by IoT networks. This paper builds upon recent research, enhancing QoS-aware path selection, dynamic resource management, and security in multi-tenant environments. Through a detailed case study of a smart building IoT network, we demonstrate how the proposed architecture improves scalability, latency, throughput, and security compared to traditional TCP/IP and SDN-based solutions.