Google is your friend:
vSphere Virtual Machine Replication: VMware | VMware United Kingdom
vSphere Data Protection & Recovery: VMware | VMware United Kingdom
The first is a help for DR, the second is for backup/restore.
Do vSphere Replication and Data Protection perform their jobs on the currently running live VMs or on the VM datastore file ?
From my current understanding, vSphere Replication would be performed on the live VMs, while Data Protection performed on the VM datastore file. Is this correct ?
The answers to those questions (and many more) can be found on the pages I linked to.
Both vSR and vDP take data from the datastore of the VMs.
Thanks scott28tt. I have read the pages too