KCSA Platform Security Practice Question
An organization requires that all container images pulled into a Kubernetes cluster are cryptographically signed and verified before execution. Which tool integrates with Kubernetes admission control to enforce signature verification using Cosign?
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
✓
Kyverno policy engine
Policy engines such as Kyverno or OPA Gatekeeper integrate with Sigstore Cosign to verify container image signatures during admission control.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Cilium CNI plugin
Why it's wrong here
Cilium provides networking, network policies, and eBPF security, but signature verification is handled via admission webhook policy engines.
- ✗
Metrics-server
Why it's wrong here
Metrics-server collects resource metrics for horizontal pod autoscaling and has no security enforcement role.
- ✓
Kyverno policy engine
Why this is correct
Kyverno supports native image verification rules using Cosign signatures and public keys.
- ✗
Helm package manager
Why it's wrong here
Helm manages application templates and releases, but does not enforce runtime or admission image signature policies.
About these practice questions
One of 320 original KCSA practice questions on Courseiva, each with a full explanation and wrong-answer analysis — not exam dumps or protected exam content. Learn why practice questions differ from exam dumps →
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.