Since the introduction of digital telecommunication, networks have been growing and increasing in capacity exponentially, following the extraordinary developments in semiconductors and the larger computer industry. The growing capacity and also complexity of networks has led the industry to create technologies to make deploying, managing and monitoring networks an easier task. Amidst the rapid developments, network vendors have to keep up with competition and do not want to be bound by the relatively slow development cadence of hardware. Instead, the telecommunications industry have taken a page from the computer industry book, and embraced the practice of virtualisation.