Ok, I have some knowledge about VMware vSphere, but I can’t remember everything. Good thing there are some people out there that have some good ideas about reference material. One of them is VMware Technical Account Manager Dudley Smith who created a nice diagram of all the ports used within a vSphere environment.
Check out the blog post over here and download the nice ports diagram in PDF format.
Update : Also check this KB article by VMware for ports used by VMware products.