CCSP Cloud Platform and Infrastructure Security Practice Question
A company is adopting a microservices architecture on Kubernetes and needs to ensure least privilege for pod-to-pod communication. Which THREE controls 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
✓
Service accounts with minimal permissions
Network policies restrict pod communication, RBAC controls pod permissions, and service accounts with limited permissions enforce least privilege.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Service accounts with minimal permissions
Why this is correct
Correct: Service accounts are used for pod identity; minimal permissions reduce risk.
- ✓
Network policies to allow only necessary traffic between pods
Why this is correct
Correct: Network policies define ingress/egress rules.
- ✓
RBAC to limit what pods can do within the cluster
Why this is correct
Correct: RBAC restricts pod permissions.
- ✗
Pod Security Admission to enforce that containers run as root
Why it's wrong here
Running as root is not least privilege; should avoid root.
- ✗
Horizontal Pod Autoscaler
Why it's wrong here
HPA scales pods, not a security control.
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.