200-901 Application Deployment and Security Practice Question
In a Kubernetes cluster, a developer needs to ensure that a set of pods can be accessed by other pods using a stable IP address and DNS name, even if pods are recreated. Which resource should be created?
⚠ Common exam trap
Cisco often tests the misconception that a Deployment alone provides stable networking, but a Deployment only ensures desired pod count and updates, not a fixed network identity — the Service resource is required for that.
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 in Kubernetes provides a stable virtual IP (ClusterIP) and a DNS name (via CoreDNS) that persists across pod restarts and rescheduling. This allows other pods to reliably discover and communicate with the set of pods behind the Service, regardless of individual pod IP changes.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
ConfigMap
Why it's wrong here
A ConfigMap stores non-sensitive configuration data, not network endpoints.
- ✗
Namespace
Why it's wrong here
A Namespace provides resource isolation, not network stability.
- ✓
Service
Why this is correct
A Service provides a stable IP and DNS name for a set of pods, abstracting pod IP changes.
- ✗
Deployment
Why it's wrong here
A Deployment manages pod replicas and updates, but does not provide a stable network endpoint.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 200-901 practice question is part of Courseiva's free Cisco 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 200-901 exam.