12. Virtualizing Core Networking Functions
The previous chapters introduced the concepts and theories with examples of network virtualization, network appliance virtualization, and even network function virtualization. These are all complex subjects, and because they are so closely related, they can blur into one confusing jumble. Therefore, before introducing network functions virtualization (NFV) in the core networks, this seems like an opportune moment to recap what you have already learned so far to keep it all straight.
In the early 2000s, IT introduced virtualization into the organization using the VMware desktop, and later when confidence had grown, around the mid 2000s, into the data center through the implementation ...