The issue focused on advanced networking technologies at large enterprise scale is related to virtualization as well as cluster computing and distributed computing in general. Even though virtualization may seem very convenient for consumers and developers and although virtual machines may appear very convenient for enterprise computing purposes, most enterprise administrators find them extremely inconvenient and inefficient and therefore mostly ignore them. Most enterprise administrators cannot manage virtual machines themselves but prefer to utilize solutions provided by specialized vendors who manage virtual machines for them. Another feature that comes up frequently is that virtual machines provide various