KCNA Kubernetes Fundamentals Practice Question
Which Kubernetes object provides stable network endpoints and load balancing for a set of pods?
⚠ Common exam trap
A common mix-up: candidates confuse a Deployment’s ability to manage Pod replicas with providing a stable network endpoint, forgetting that Pod IPs are ephemeral and only a Service offers a fixed virtual IP and load balancing.
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 Kubernetes Service provides a stable virtual IP (ClusterIP) and DNS name that remains constant even as Pods are created or destroyed. It uses label selectors to identify target Pods and performs TCP/UDP load balancing across them, ensuring reliable network access without requiring clients to track ephemeral Pod IPs.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Deployment
Why it's wrong here
A Deployment manages ReplicaSet rollout and pod lifecycle; it creates no stable virtual IP or load-balancing rule, and its pod addresses change on rescheduling. It is tempting because Deployments are the standard way to run replicated pods, and it would be correct when the requirement is declarative rolling updates and replica management rather than stable network endpoints.
- ✗
ConfigMap
Why it's wrong here
A ConfigMap stores non-confidential configuration as key-value data consumed by pods; it exposes no network endpoint and performs no load balancing. It is tempting because ConfigMaps are commonly paired with Services to inject endpoint or port settings, and it would be correct when the requirement is decoupling configuration data from container images.
- ✓
Service
Why this is correct
A Kubernetes Service provides a stable virtual IP and DNS name that persists independently of pod lifecycles, satisfying the stem’s requirement for stable network endpoints. It uses label selectors to identify target pods and distributes incoming traffic across them via kube-proxy’s iptables or IPVS rules, fulfilling the load-balancing constraint without relying on individual pod IPs that change on rescheduling.
- ✗
Pod
Why it's wrong here
A Pod has a single ephemeral IP that changes whenever the pod is recreated, and it provides no load balancing across replicas. It is tempting because pods are the unit that actually serves traffic, and a bare Pod would be correct for a single-instance workload where stable addressing and horizontal distribution are not required.
Go deeper
Related to this question
Learn chapter
Pods and Workload Management
Key term
Kubernetes API Primitives
Kubernetes API Primitives are the basic building blocks that the Kubernetes API uses to represent and manage the state of a cluster, such as Pods, Services, Deployments, and Namespaces.
Key term
ReplicaSet and Replication
A ReplicaSet ensures a specified number of identical pod instances are running at all times in Kubernetes, using replication to maintain availability and stability.
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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.