CKA Services and Networking Practice Question
You need to create a Service that exposes port 80 on each node's IP at a static port (30080). Which Service type should you use?
⚠ Common exam trap
Candidates often confuse NodePort with LoadBalancer, thinking a load balancer is required for external access, but NodePort directly satisfies the requirement of exposing a static port on each node's IP without any cloud dependency.
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
✓
NodePort
A NodePort Service exposes the application on a static port (30080) across every node's IP address in the cluster. This is the only Service type that allows you to specify a fixed port on the node's IP, making it the correct choice for this requirement.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
NodePort
Why this is correct
NodePort exposes the Service on each node's IP at a static port (30080).
- ✗
LoadBalancer
Why it's wrong here
LoadBalancer provisions an external load balancer, not necessarily a static node port.
- ✗
ClusterIP
Why it's wrong here
ClusterIP only exposes the Service internally within the cluster.
- ✗
ExternalName
Why it's wrong here
ExternalName maps the Service to an external DNS name, not a node port.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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