1Z0-1127-25 Deploying and Managing Generative AI on OCI Practice Question
A developer wants to invoke an OCI Generative AI model from an application running on a compute instance in OCI. The instance is in a private subnet. What is the most secure method to access the model endpoint?
⚠ Common exam trap
Many exam-takers confuse a NAT Gateway with a Service Gateway, assuming that any gateway providing outbound access is sufficient, but only a Service Gateway offers private, secure access to OCI services without internet exposure.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use a Service Gateway to access the endpoint privately.
A Service Gateway allows resources in a private subnet to access OCI services, including the Generative AI model endpoint, over the OCI private network without traversing the internet. This is the most secure method because traffic stays within the OCI backbone, avoiding exposure to public IPs and reducing the attack surface.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Use a Service Gateway to access the endpoint privately.
Why this is correct
A Service Gateway enables private access to OCI services without traversing the internet.
- ✗
Use an Internet Gateway and public endpoint.
Why it's wrong here
This exposes the traffic to the public internet, reducing security.
- ✗
Use a VPN Connect to connect to the model's public IP.
Why it's wrong here
VPN connects to a public IP and does not leverage private OCI endpoints.
- ✗
Use a NAT Gateway to access the endpoint.
Why it's wrong here
A NAT Gateway still routes traffic through the internet, not fully private.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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