KCSA Platform Security Practice Question
You are configuring an Ingress resource using the NGINX Ingress Controller to expose a sensitive internal application. To prevent unauthorized clients from connecting, you want to enable mutual TLS authentication at the ingress layer. Which annotation is required in the Ingress resource definition to specify the Kubernetes Secret containing the trusted Client CA certificate?
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
✓
nginx.ingress.kubernetes.io/auth-tls-secret
The NGINX ingress controller uses specific annotations such as 'nginx.ingress.kubernetes.io/auth-tls-secret' to point to the Kubernetes secret containing the CA certificate used to verify client certificates.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
ingress.kubernetes.io/backend-protocol
Why it's wrong here
This annotation specifies the protocol (HTTP, HTTPS, GRPC) used to communicate with the backend pods.
- ✓
nginx.ingress.kubernetes.io/auth-tls-secret
Why this is correct
This specific annotation tells the NGINX Ingress controller which secret contains the CA certificate for validating client certificates.
- ✗
kubernetes.io/ingress.class
Why it's wrong here
This annotation defines which ingress controller should handle the ingress resource.
- ✗
nginx.ingress.kubernetes.io/ssl-redirect
Why it's wrong here
This annotation forces HTTP traffic to redirect to HTTPS, but does not configure client certificate validation.
About these practice questions
This KCSA question is part of Courseiva's 320-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. 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.