No 
you don't need to do that . I think you will need to take a course for understanding all VMware's functionalities.
Allan please click Vote As Helpful, and/or Mark As Answer if your issue is resolved.
Edit : Some links for your understanding.
HA : http://www.vmware.com/products/datacenter-virtualization/vsphere/high-availability.html
DRS : VMware vSphere Distributed Resources Scheduler & Power Management
VSA : vSphere Storage Appliance - Shared Storage for Everyone
All features with vsphere : VMware vSphere: Enterprise Cloud Computing & Virtualization Features
Regards,
Julien.