KCSA Compliance And Security Frameworks Practice Question
An auditor is assessing compliance with NIST SP 800-53 controls for access control (AC) within a managed Kubernetes cluster. Which API object enforces fine-grained authorization decisions directly at the Kubernetes API server?
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
✓
ClusterRoleBinding
Kubernetes Role-Based Access Control (RBAC), implemented via ClusterRole and Role bindings, enforces NIST-aligned access control policies at the API server layer.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
ValidatingWebhookConfiguration
Why it's wrong here
Webhooks intercept requests but RBAC is the core authorization engine.
- ✗
NetworkPolicy
Why it's wrong here
NetworkPolicy controls layer 3/4 network traffic between pods.
- ✓
ClusterRoleBinding
Why this is correct
ClusterRoleBindings assign permissions to subjects across the cluster, enforcing RBAC.
- ✗
ResourceQuota
Why it's wrong here
ResourceQuota limits aggregate resource consumption per namespace.
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 |
About these practice questions
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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 CNCF / Linux Foundation exam blueprint
This KCSA practice question is part of Courseiva's free CNCF / Linux Foundation 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 KCSA exam.