In Pictures: Software-defined networking explained

Understand how SDN will change everything in 10 easy steps

Hypervisor connectivity The most useful applications of controller-based networking today are being implemented in hypervisors such VMware vSphere, Microsoft Hyper-V, and the open source KVM project. From a networking perspective, a hypervisor usually hosts several VMs (virtual machines), which are connected to a virtual switch, which in turn is connected to the physical network. Today, the virtual switch is not a network device but a robot patch panel for connecting a VM to the physical network.

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