Thanks for all the details .
Preston de Guise, you mentioned about having an advantage of updates.
Is it mandatory to have networker support contract to perform an
upgrade ?
Thanks once again
Yes ... while minor releases (e.g., going from 7.3 to 7.4.x) won't
require any additional licenses, making a significant change will
require an update enabler.
Furthermore, EMC's license agreement is that you have support/
maintenance in order to update.