KCNA Kubernetes Fundamentals Practice Question
You need to expose a set of pods running a web application to internal cluster traffic on a stable IP address. Which resource should you create?
⚠ Common exam trap
CNCF often tests the distinction between internal and external exposure, and the trap here is that candidates may confuse a Service of type ClusterIP with NodePort, thinking NodePort is needed for any stable IP, when ClusterIP is the correct choice for internal-only traffic.
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
✓
Service of type ClusterIP
A Service of type ClusterIP exposes the set of pods on a stable, internal IP address that is only reachable within the cluster. This is the default Service type and is specifically designed for internal cluster traffic, providing a stable virtual IP (VIP) that load-balances requests to the underlying pods.
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Same concept, more angles
1 more way this is tested on KCNA
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A developer has created a Deployment with 3 replicas. The application should be reachable from other Pods within the same cluster. Which Kubernetes resource should be used to provide a stable network endpoint?
medium- A.Ingress
- ✓ B.Service
- C.PersistentVolumeClaim
- D.ConfigMap
Why B: A Service provides a stable network endpoint (ClusterIP) that load-balances traffic across the Pod replicas, abstracting away Pod IP changes due to restarts or scaling. This allows other Pods within the cluster to reach the application reliably using the Service's DNS name, without needing to track individual Pod IPs.
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This KCNA practice question is part of Courseiva's free CNCF 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 KCNA exam.