Are Oracle AI Studio’s hosted LLMs secure, and where are they deployed?

Can you please share the below details.

Question 1:
Where are the AI models and large language models (LLMs) hosted? Are they hosted on Oracle Fusion, on OCI, or somewhere else?

Question 2:
In the Oracle AI Studio process flow, we see Oracle Database 23ai. Where is the 23ai database hosted—on Oracle Fusion, on OCI, or somewhere else?

Question 3:
When we use Oracle‑hosted LLMs, does the data leave our internal network or Oracle tenancy? Is the data we send to the model secure?

Thank you.