KCNA Kubernetes Fundamentals Practice Question
Which resource type provides a stable IP address and DNS name to access a set of Pods, regardless of Pod IP changes?
⚠ Common exam trap
It's easy for candidates to confuse Ingress with providing a stable IP/DNS for Pods, but Ingress only routes external traffic to a Service and does not itself assign a stable internal endpoint.
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
A Service in Kubernetes provides a stable virtual IP (ClusterIP) and a DNS name (via CoreDNS) that remains constant even as Pods are created, destroyed, or rescheduled. This decouples client access from the ephemeral nature of Pod IPs, ensuring reliable connectivity to the Pods selected by the Service's label selector.
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
Why it's wrong here
Ingress provides HTTP/S routing to Services, not direct stable IP.
- ✗
ConfigMap
Why it's wrong here
ConfigMaps store configuration data, not networking.
- ✗
Deployment
Why it's wrong here
Deployments manage Pod replicas but do not provide a stable IP.
- ✓
Service
Why this is correct
Services provide stable networking for 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. Which Kubernetes object provides a stable IP address and DNS name for a set of Pods?
easy- A.Ingress
- B.ConfigMap
- ✓ C.Service
- D.Deployment
Why C: A Service provides a stable virtual IP address and a DNS name (e.g., my-svc.namespace.svc.cluster.local) that remains constant even as Pods are created or destroyed. This enables reliable network access to a dynamic set of Pods selected via labels, abstracting away Pod IP volatility.
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.