These are best practices and proven practices how a design for all components in the SDDC might look like. It will highlight a possible cluster layout including a detailed description want needs to be put where and why a certain configuration needs to be made like that.
Typically, every design should have an overview to quickly understand what the solution is going to look like and how the major components are related. In the SDDC one could start drawing the used vSphere Clusters including their functions.
This following image describes an SDDC that is going to be run on the three cluster approach:
The three clusters are as follows: