What's a secure cert and why would you want to use it?
Why isn't it enabled by default?
What's a self-signed cert vs. a public CA signed cert?
What hub features do not use this?
The management hub uses TLS (HTTPS) to communicate between hub components and the exchange APIs. Any component that needs to communicate externally will likely use a separate certificate to communicate with the external host, for example, the SDO component's OCS API.