I find that some people have a good understanding of vSphere core storage functionality and some people don't (not a problem).
With the above in mind, I usually point people towards a VMworld session by Cormac Hogan and Cody Hosterman
VMworld 2017 - SER1143BE - A Deep Dive into vSphere 6.5 Core Storage Features and Functionality
The session covers
- VAAI (ATS Miscompare and UNMAP)
- SPBM (SIOCv2 and vSphere VM Encryption)
- NFS v4.1