KCNA Kubernetes Fundamentals Practice Question
Which THREE of the following are valid ways to expose a Service to external traffic? (Select exactly three.)
⚠ Common exam trap
Candidates often mistakenly think ExternalName is an external exposure method, but it only creates a DNS alias within the cluster and does not route external 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
✓
Ingress
Ingress is correct because it provides HTTP/HTTPS routing rules to expose Services externally, typically using a reverse proxy like NGINX or HAProxy. It operates at Layer 7, allowing host and path-based routing to multiple Services behind a single external endpoint, which is a valid way to expose traffic.
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 this is correct
Ingress provides HTTP/HTTPS routing to services.
- ✗
ExternalName
Why it's wrong here
ExternalName returns a CNAME record, not an external IP.
- ✗
ClusterIP
Why it's wrong here
ClusterIP is only reachable within the cluster.
- ✓
NodePort
Why this is correct
Exposes the service on a static port on each node's IP.
- ✓
LoadBalancer
Why this is correct
Provision an external load balancer (cloud provider).
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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.