Final answer:
To install a computer image from a remote server using RIS, the Preboot Execution Environment (PXE) technology is utilized, which enables network-based booting of the PC.
Step-by-step explanation:
When setting up a new machine with a copy of a computer image stored on a remote server, Remote Installation Services (RIS) can be utilized to install this image.
The technology that aids RIS in installing this image is Preboot Execution Environment (PXE). PXE allows a workstation to boot from the network, rather than from a local storage device, such as a hard drive or CD-ROM.
With PXE, the user's PC can load an operating system from a remote server, which is where the computer image can be stored and retrieved during installation.