KCSA Kubernetes Cluster Component Security Practice Question
You are hardening etcd on a dedicated control plane host. You want to ensure that etcd database files on disk are protected against unauthorized physical or filesystem access. Which control mechanism is best suited for 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
✓
Filesystem or block-level disk encryption (e.g., LUKS) on the host storage volume.
Operating system level disk encryption (such as LUKS) protects files at rest on block storage devices.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Kubernetes NetworkPolicies applied to the etcd Pod.
Why it's wrong here
NetworkPolicies control network traffic, not local filesystem storage security.
- ✗
API server RBAC ClusterRoleBinding.
Why it's wrong here
RBAC controls API access, not host filesystem encryption.
- ✓
Filesystem or block-level disk encryption (e.g., LUKS) on the host storage volume.
Why this is correct
Disk encryption protects the underlying storage where etcd writes its data files and WALs.
- ✗
Kubelet read-only port disabling.
Why it's wrong here
Disabling the read-only port secures the kubelet, not etcd disk storage.
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.