Which of the following is a centrally hosted and managed desktop environment with the capability of spanning multiple offices across various countries in which each user's desktop instance is dynamically provisioned?

a. VPN

b. IaaS

c. VDI

d. SaaS

C. VDI

Explanation:

IaaS and SaaS, which are infrastructure as a service and Software as a service, are cloud services and not centrally hosted, and rather distributed like AWS has multiple data centers based in various global regions,

VPN connects the sites and the users.

And VDI is the virtual desktop Infrastructure. And it deals in running various user desktops within the VM which are being hosted within the VM which are located on various data centers. And each of the users is given access to a dedicated VM, and which runs the different OS. The connection broker is responsible for managing the VMs.