Hi,
Thanks for you answer.
Some precisions :
#1, I will have to install a CAS anyway because this lab will be a "clone" (in the form, not in the content) of our real SCCM infrastructure.
#2, 8 DPs because we have 8 DPs in production, and as i said this lab is a "clone" of our infrastructure. There will only be a couple of applications on these DPs.
#3, Concerning the RAM, this is where I really don't know what to do, because the hierarchy is pretty big in the form, but not in the content.