The correct answer is: Network.
Network virtualization is the process of creating a virtual network that can be managed independently of the underlying physical network. This can be done by using software to create virtual switches, routers, and other network devices. Network virtualization can be used to improve performance, scalability, and security.
Storage virtualization is the process of abstracting storage hardware and software into a virtual storage system that can be managed. This can be done by using software to create virtual disks, volumes, and other storage devices. Storage virtualization can be used to improve performance, scalability, and reliability.
Software virtualization is the process of creating a virtual machine that can run on a physical machine. This can be done by using software to create a virtual operating system, hardware, and other software components. Software virtualization can be used to improve performance, scalability, and security.
None of the mentioned is not the correct answer.