1Z0-997-26 Cloud Native Architecture Practice Question
Your OKE cluster uses Calico for Kubernetes network policy enforcement. You need to write a network policy that allows Pod A in namespace 'frontend' to communicate with Pod B in namespace 'backend', while blocking all other ingress traffic to Pod B. How should you implement this?
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
✓
Create a Kubernetes NetworkPolicy in the 'backend' namespace selecting Pod B and allowing ingress exclusively from namespace 'frontend'.
A Kubernetes NetworkPolicy in namespace 'backend' specifying podSelector for Pod B and ingress rules allowing from namespaceSelector with 'frontend' satisfies this requirement.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Apply an OCI Identity and Access Management (IAM) policy restricting pod access.
Why it's wrong here
Incorrect. IAM policies control OCI API access, not pod network traffic.
- ✗
Configure an OCI Load Balancer listener rule for namespace ports.
Why it's wrong here
Incorrect. Load balancers do not enforce pod-to-pod network policies inside the cluster.
- ✓
Create a Kubernetes NetworkPolicy in the 'backend' namespace selecting Pod B and allowing ingress exclusively from namespace 'frontend'.
Why this is correct
Correct. Kubernetes NetworkPolicy objects enable fine-grained namespace and pod-level isolation.
- ✗
Modify the VCN Security List for the worker node subnet to filter traffic by pod name.
Why it's wrong here
Incorrect. VCN Security Lists operate at the subnet and IP level; they have no visibility into Kubernetes pod names or namespaces.
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Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official Oracle exam blueprint
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