MOUNTAIN VIEW, Calif.--(BUSINESS WIRE)--Cumulus Networks®, provider of the Cumulus® Linux® operating system for open networking, today announced the launch of Cumulus VX (Virtual Experience), a free virtual appliance designed to simulate the traditional Cumulus Networks technology environment. Cumulus® VX™ provides a new way for data center cloud administrators and network engineers to learn, prototype and develop open networking concepts at their own pace, in their own environments. Cumulus VX