Network virtualization

Network virtualization  is defined by the ability to create logical, virtual networks that are decoupled from the underlying network hardware to ensure the network can better integrate with and support increasingly virtual environments. Over the past decade, organizations have been adopting virtualization technologies at an accelerated rate.  Network virtualization (NV) abstracts networking connectivity and services that have traditionally been delivered via hardware into a logical virtual network that is decoupled from and runs independently on top of a physical network in a hypervisor.  Beyond L2-3 services like switching and routing, NV typically incorporates virtualized L4-7 services including firewalling and server load-balancing. NV solves a lot of the networking challenges in today’s data centers, helping organizations centrally program and provision the network, on-demand, without having to physically touch the underlying infrastructure. With NV, organizations can simplify how they roll out, scale and adjust workloads and resources to meet evolving computing needs.
With virtualization, companies can take advantage of the efficiencies and agility of software-based compute and storage resources. While networks have been moving towards greater virtualization, it is only recently, with the true decoupling of the control and forwarding planes, as advocated by software-defined networking and network functions virtualization,that network virtualization has become more of a focus.

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