CAS-004 Security Architecture Practice Question
A security engineer is hardening a Kubernetes environment. Which THREE of the following are effective controls for securing the cluster? (Select THREE.)
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
✓
Enabling Pod Security Admission (PSA) to enforce pod security standards
RBAC controls API access, Pod Security Standards (or admission controllers) enforce pod security, and Network Policies restrict pod communication. All three are Kubernetes-native controls for cluster hardening.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Configuring load balancers for high availability
Why it's wrong here
High availability is an operational concern, not a security hardening control.
- ✓
Enabling Pod Security Admission (PSA) to enforce pod security standards
Why this is correct
PSA prevents pods from running with excessive privileges.
- ✓
Implementing RBAC for API server access
Why this is correct
RBAC restricts who can perform actions on the cluster.
- ✓
Using Network Policies to isolate workloads
Why this is correct
Network Policies provide micro-segmentation.
- ✗
Installing antivirus on all nodes
Why it's wrong here
Containers share the host OS kernel; antivirus is not a typical Kubernetes 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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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This CAS-005 practice question is part of Courseiva's free CompTIA 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 CAS-005 exam.