CCSP Cloud Platform and Infrastructure Security Practice Question
In a Kubernetes environment, a security team wants to enforce that only images signed by a trusted authority can be deployed. Which component can be used to validate image signatures at admission time?
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
✓
Admission controller (e.g., OPA Gatekeeper)
Admission controllers like OPA Gatekeeper or Kyverno can verify image signatures before a pod is created. RBAC controls access, not image validity; network policies manage traffic; secrets management handles credentials.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Network policies
Why it's wrong here
Network policies govern pod-to-pod traffic, not image admission.
- ✓
Admission controller (e.g., OPA Gatekeeper)
Why this is correct
Admission controllers can enforce policies such as requiring signed images.
- ✗
RBAC policies
Why it's wrong here
RBAC controls what users can do, not image validation.
- ✗
Secrets management with Vault
Why it's wrong here
Secrets management stores sensitive data but does not validate images.
Quick reference
Access Control Model Comparison
| Model | Acronym | Who Controls Access? | Best For |
|---|---|---|---|
| Discretionary Access Control | DAC | Resource owner | Small teams, file shares |
| Mandatory Access Control | MAC | System / security labels | Classified govt / military |
| Role-Based Access Control | RBAC | Administrator (via roles) | Enterprise environments |
| Attribute-Based Access Control | ABAC | Policy engine (user + resource attributes) | Fine-grained, dynamic policies |
| Rule-Based Access Control | RuBAC | System rules / ACLs | Firewall rules, network ACLs |
Go deeper
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This CCSP practice question is part of Courseiva's free ISC2 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 CCSP exam.