EX280 Networking And Network Policies Practice Question
An administrator needs to check the internal DNS resolution of a service named 'backend' within the 'production' namespace from a debug pod. Which DNS name is fully qualified and valid within the cluster?
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.production.svc.cluster.local
The standard FQDN format for a Kubernetes service is <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.production.pod.cluster.local
Why it's wrong here
Services use the .svc subdomain, not .pod.
- ✗
backend.production.router.default.svc
Why it's wrong here
Routers are not part of the standard core DNS service name pattern.
- ✗
svc.production.backend.cluster.local
Why it's wrong here
The order of service name and namespace is incorrect.
- ✓
backend.production.svc.cluster.local
Why this is correct
This is the correct fully qualified domain name structure for internal cluster services.
Visual reference
About these practice questions
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JA
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
This EX280 practice question is part of Courseiva's free Red Hat 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 EX280 exam.