1Z0-997-26 Security Practice Question
An enterprise customer needs to restrict access to an OCI Object Storage bucket so that only requests originating from a specific Virtual Cloud Network (VCN) via a Service Gateway can read objects. Which combination of Identity and Access Management (IAM) and network policies should be implemented?
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
✓
Configure a bucket policy that denies all read requests unless the request comes through a Service Gateway using the condition 'request.region, target.bucket.id, and request.network.source'.
To restrict access to a VCN via a Service Gateway, you must use IAM policy conditional statements utilizing the target.orcl.ocid for the service gateway or the request.vcn.id, combined with an appropriate Object Storage bucket policy or IAM policy.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Configure a bucket policy that denies all read requests unless the request comes through a Service Gateway using the condition 'request.region, target.bucket.id, and request.network.source'.
Why this is correct
Object Storage bucket policies support advanced conditions such as request.network.source to restrict traffic exclusively to specified Service Gateways or VCNs.
- ✗
Enable OCI Cloud Guard Security Zones on the compartment and automatically enforce a deny-all policy on the bucket.
Why it's wrong here
Security Zones enforce predefined security recipes, but they do not dynamically rewrite custom data access paths for specific Service Gateways.
- ✗
Route all Object Storage traffic through a DRG (Dynamic Routing Gateway) and apply stateful network firewall rules to drop non-VCN traffic.
Why it's wrong here
Traffic to Object Storage via a Service Gateway does not traverse a DRG; it uses regional service network routing.
- ✗
Create an IAM policy with the condition 'where request.vcn.id = <vcn-ocid>' and attach a security list to the VCN subnet allowing outbound traffic to Object Storage.
Why it's wrong here
Security lists control packet filtering at the subnet level, but IAM policy conditions with request.vcn.id ensure the API calls themselves originate from the authorized VCN.
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official Oracle exam blueprint
This 1Z0-997-26 practice question is part of Courseiva's free Oracle certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 1Z0-997-26 exam.