Nowadays, new services and current IT applications require an increasingly dynamic telecommunication network capable of adapting to the changing needs of users and network managers in a short time. So, in the recent years a new technological paradigm is born called Software Defined Networking (SDN) able to change strongly the way to interact with the network devices. These changes have been possible also thanks to the rapid development of a new technological concept: the Virtualization. With the introduction of the Network Function Virtualization (NFV) and the SDN architectures the software component is playing a key role in a lot of applications of the Information and Communications Technology (ICT). Now, thanks to these new paradigms, the networks are became ”smart” and ”programmable”. Then, the possibility of using adequate tools for performing test on networks and devices represents an important way to operate without the need of buying expensive hardware. Mininet is a software emulator able to manage a set of network terminals (hosts), switches, routers and also the various connections on a single Linux environment and it is able to simulate an entire network. In this paper, an overview on Mininet network emulator is provided showing its potential and scalability with different network topologies
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