CAS-004 Security Architecture Practice Question
A company is deploying containerized applications on Kubernetes and needs to ensure that only authorized images are run in the cluster. Which Kubernetes resource should be used to enforce policies on what containers can run, including image source restrictions?
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 controllers
Admission controllers intercept requests to the Kubernetes API server before object persistence, allowing policy enforcement such as ensuring images come from a trusted registry. Pod Security Policies are deprecated; Pod Security Admission or custom admission controllers are current.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Role-Based Access Control (RBAC)
Why it's wrong here
RBAC controls user access to Kubernetes resources, not image policies.
- ✗
Network policies
Why it's wrong here
Network policies control pod-to-pod communication, not image authorization.
- ✗
Seccomp profiles
Why it's wrong here
Seccomp restricts system calls, not image authorization.
- ✓
Admission controllers
Why this is correct
Admission controllers can enforce image policies, such as requiring images from a trusted registry.
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JA
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.