In which type of virtualization is the entire desktop environment of a computer emulated on a server?

The correct option is 'Desktop Virtualization.' In desktop virtualization, the entire desktop environment of a computer is emulated on a server, and users access their desktops remotely. This approach allows for centralized management, security, and the ability to run different operating systems on the same hardware. Server virtualization, on the other hand, involves virtualizing server hardware to run multiple server instances on a single physical server. Network virtualization focuses on virtualizing network resources, while application virtualization virtualizes individual applications for deployment.