KCNA Kubernetes Fundamentals Practice Question
Which Kubernetes object provides a stable IP address and DNS name for a set of Pods?
⚠ Common exam trap
CNCF often tests the misconception that a Deployment provides a stable network identity, when in fact it only manages Pod replicas and their lifecycle, while the Service object is solely responsible for stable IP/DNS abstraction.
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 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.
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 manages external access to Services, typically HTTP, but is not the stable endpoint itself.
- ✗
ConfigMap
Why it's wrong here
ConfigMaps store configuration data, not network endpoints.
- ✓
Service
Why this is correct
A Service abstracts a set of Pods and provides a stable IP and DNS name.
- ✗
Deployment
Why it's wrong here
Deployments manage Pod replicas but do not provide a stable network endpoint.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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