Networking And Network Policies →mediumMultiple ChoiceObjective-mapped

EX280 Networking And Network Policies Practice Question

A developer reports that pods in the namespace 'project-a' cannot resolve services located in the namespace 'project-b' using standard internal DNS names. What is the correct way to query 'project-b' service 'backend' from 'project-a'?

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

✓

backend.project-b.svc.cluster.local

Kubernetes cluster DNS allows cross-namespace resolution using the FQDN format <service-name>.<namespace>.svc.cluster.local.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

✓
backend.project-b.svc.cluster.local
Why this is correct
Services are resolved across namespaces using the svc.cluster.local domain extension.
✗
backend.project-b.pod.cluster.local
Why it's wrong here
The domain suffix for pods is .pod.cluster.local, not services.
✗
backend.project-b.svc
Why it's wrong here
A short suffix of .svc is insufficient for cross-namespace DNS resolution without the cluster domain.
✗
backend.project-b.internal
Why it's wrong here
OpenShift does not use the .internal domain for standard internal service discovery.

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About these practice questions

Courseiva writes every EX280 question from scratch — 509 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. Learn why practice questions differ from exam dumps →

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Written and reviewed by Johnson Ajibi, MSc IT Security

Senior Network & Security Engineer · founder of Courseiva

Last reviewed August 2026 · checked against the official Red Hat exam blueprint

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