Thanks for the reply.
I understand: A port can be “formalized” to only one interface.
I understand: However, the port on one component can “connect” to the port (Interface Reference) on the port of another component more than once.
I understand: This is limited to the client (Requirement) side.
I don’t understand: A server port (Provider) can connect with multiple clients (Providers).
Shouldn’t this be: A server port (Provider) can connect with multiple clients (*Requirers*).