KCSA Kubernetes Cluster Component Security Practice Question
You are auditing the Kubernetes control plane and notice that the API server is configured with an insecure port (--insecure-port=8080). What is the primary security implication of leaving this port enabled?
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
✓
It bypasses all authentication and authorization modules, granting full administrative access to anyone who reaches the port.
The insecure port serves HTTP requests without performing any authentication or authorization checks, allowing anyone who can reach the port full cluster access.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
It bypasses all authentication and authorization modules, granting full administrative access to anyone who reaches the port.
Why this is correct
The insecure port does not enforce authn/authz, making it a critical vulnerability.
- ✗
It prevents the kubelet from communicating with the control plane nodes.
Why it's wrong here
Modern kubelets communicate strictly over the secure port (typically 6443).
- ✗
It restricts API access exclusively to read-only operations.
Why it's wrong here
The insecure port permits full read and write operations.
- ✗
It forces all clients to downgrade their TLS encryption cipher suites to plaintext.
Why it's wrong here
It does not force TLS downgrades; it simply accepts unencrypted HTTP traffic directly.
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.