KCSA Kubernetes Cluster Component Security Practice Question
You are reviewing security logs on a control plane node and discover that an unauthenticated user accessed the kubelet's HTTPS port (10250) to execute commands inside containers. How should you restrict kubelet authentication and authorization to prevent this?
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
✓
Set authentication.anonymous.enabled: false and authorization.mode: Webhook in the kubelet configuration file.
Kubelet must be configured with authentication enabled (such as X509 client certs or webhook token auth) and authorization set to Webhook.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Enable the kubelet insecure-port flag.
Why it's wrong here
Insecure ports bypass authentication entirely.
- ✗
Set authorization.mode: AlwaysAllow in the kubelet configuration file.
Why it's wrong here
AlwaysAllow permits all requests, worsening security.
- ✗
Disable the API server proxy subresource.
Why it's wrong here
Disabling the proxy subresource breaks kubectl exec functionality entirely rather than securing kubelet directly.
- ✓
Set authentication.anonymous.enabled: false and authorization.mode: Webhook in the kubelet configuration file.
Why this is correct
This ensures the kubelet delegates authorization decisions back to the API server via RBAC rather than allowing unauthenticated access.
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.