KCSA Kubernetes Cluster Component Security Practice Question
An administrator wants to secure the communication channel between the Kubernetes API server and extension API servers (such as metrics-server). Which API server flag specifies the Certificate Authority used to verify extension API server certificates?
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
✓
--requestheader-client-ca-file
The --requestheader-client-ca-file flag specifies the CA certificate used to sign client certificates for aggregated API servers.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
--requestheader-client-ca-file
Why this is correct
This flag authenticates incoming requests from aggregated API servers.
- ✗
--extension-ca-file
Why it's wrong here
This is an incorrect flag name.
- ✗
--etcd-ca-file
Why it's wrong here
This is used for etcd connections, not extension API servers.
- ✗
--proxy-client-cert-file
Why it's wrong here
This specifies the client certificate the API server uses when proxying, not the CA for verification.
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.