cloud. We discuss the advantages of considering SDN and NFV in the telecom communication networks. We also outline the developing technology that are relevant to 5G cloudification design. Chapter 2 reviews various wired network virtualization technolo- gies and wireless virtualization. It then studies the state of the art in cloud computing, the service models, and its relationship with communication networks. In Chapter 3, we provide a survey of the existing NFV technologies. We first present its motivation, use cases, and architecture. We then focus on its key use case, the service function chaining, and the tech- niques and algorithms. In Chapter 4, we provide a review of the SDN technology and business drivers, describe the high-level SDN architecture and principles, and give three scenarios of its use cases in mobile access aggregation networks and the cloud networks. Furthermore, we provide discussions on the design implementation considerations of SDN in the mobile networks and the cloud, in comparison with traditional networks. In Chapter 5, we review the case studies of NFV in the next- generation 5G network. In particular, we discuss several use cases of SDN and NFV in the packet core network and in customer premise equipment (mobile edge networks). In both case studies, we discuss the challenges and the opportunities. The main objective of Chapter 6 is to set the stage of existing activities in the industry from both standardization and open source consortium point of view. The standards movement drives the future implementation and use cases of these technologies. Given telecom industry has traditionally taken the route of standardization followed by implementation, IETF, ETSI, and third generation partnership project (3GPP) play an important role in the future design of SDN and NFV. On the other hand, leveraging the experience of other appli- cation services, more and more network services are moving toward open source contribution approach to accelerate the functionality development cycle. Recently,