SDN enables network programming and provides network intelligence, while NFV leverages virtualization technologies to virtualize network functions.
The main advantage of the Vyatta routing solution is its ability to be executed as a virtual machine using different virtualization technologies such as Xen and VMWare.
As a conclusion, the BGP and OSPF routing protocols, the Ethernet and VLAN encapsulation as well as fault tolerance functionality are well supported by virtual routing platform using existing virtualization technologies.
On the other hand, Network virtualization technologies shift traditional network functions to virtual ones called Virtual Network Functions (VNF), and embed them into commoditized hardware.
Federated clouds can obtain great advantages from virtualization technologies and, in particular, from multiple virtual machine live migration techniques, which allow to flexibly move bulk workload across heterogeneous computing environments with minimal service disruption.
In addition, there is a strong demand in devising more flexible and efficient sharing of expensive wireless infrastructure among multiple (virtual) wireless service providers and operators using wireless virtualization technologies [152 158].
Virtualization: risks related to multi-tenancy, isolation, virtual machine co-residence and hypervisor vulnerabilities, all introduced by virtualization technologies; 13.
Virtualization technologies have also made it possible to consolidate multiple virtual machines (VMs) onto a smaller number of active physical servers for even greater power savings, but at the cost of a higher overhead.
Virtualization technologies are available or emerging for all the resources needed to construct virtual grids which would ideally inherit the above mentioned properties.
Physical network devices are represented by nodes supporting virtualization technologies.
Currently, much of the automation in virtualization technologies ignores the complexities of the applications.
