Abstract
Network virtualization refers to a broad set of technologies. Commercial
solutions have been offered by the industry for years, while more recently
the academic community has emphasized virtualization as an enabler for network
architecture research, deployment, and experimentation. We review the entire
spectrum of relevant approaches with the goal of identifying the underlying
commonalities. We offer a unifying definition of the term “network virtualization”
and examine existing approaches to bring out this unifying perspective. We
also discuss a set of challenges and research directions that we expect to
come to the forefront as network virtualization technologies proliferate.
© 2012 IEEE
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