Definition - What does Open vSwitch mean?
Techopedia explains Open vSwitch
Open vSwitch is able to run on any Linux-based virtualization platform with a kernel of 2.6.18 or later. These platforms are VirtualBox, KVM, Xen, XenServer and the Xen Cloud Platform. Open vSwitch is written in C and can be ported to any environment. As of Linux 3.3, it is part of the mainline kernel.