Why does persistent cache enable the Radiology group to maintain their changes?

Why does Provisioning Services with cache on server help the Radiology group maintain
changes in their desktops?

Why does using PvD enable the Radiology group to maintain user changes?

Why does Provisioning Services with private image mode enable users in the Radiology
group to maintain the changes to their desktops?

Individual users in the Radiology group want to install a variety of third-party tools to analyze
the images they use. They also need to be able to analyze a centrally stored image
database that they access remotely. Which XenDesktop (FlexCast) model should the
architect recommend to achieve this goal?

How should a hosted shared environment be implemented to allow user-installed
applications?

How should a Hosted VDI environment be implemented to allow user-installed applications?

How should a Streamed VHD environment be configured to allow user-installed
applications?

How should a Local VM environment be implemented to allow user-installed applications?

What are the benefits of using a hosted shared environment?