With the exponential growth of devices connected to internet, manage the security of networks becomes as a difficult challenge for network administrator. Maintain and secure a heterogeneous network on a large scale is a complex task. In this context, the new paradigm Software Defined Networking (SDN), offers many possibilities and provides the potential to address those challenges. In this paper, we present a new architecture, called SDN domain, based on the concepts of the SDN for networks with or without infrastructure. A domain includes wired, wireless and ad-hoc networks. A second architecture is proposed to integrate the communicating things on the network and the domain SDN. Different domains is then interconnected. The management of the security is distributed. Finally, we also propose one new secured and distributed architecture for the Internet of Things (IoT).