This KCNA practice question tests your understanding of kubernetes fundamentals. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Which Kubernetes resource provides a stable IP address and DNS name to access a set of pods?
Ingress
Why wrong: Ingress manages external access to services, typically HTTP.
EndpointSlice
Why wrong: EndpointSlice tracks network endpoints of Services, but is not the stable endpoint itself.
Service
A Service provides a stable IP and DNS name to reach a group of pods.
NetworkPolicy
Why wrong: NetworkPolicy controls traffic flow, not service discovery.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Service
Option C is correct because a Kubernetes Service provides a stable virtual IP address and a DNS name (e.g., my-svc.namespace.svc.cluster.local) that remains constant even as the underlying pods are created, destroyed, or scaled. This abstraction allows clients to reliably reach a set of pods without needing to track individual pod IPs, which are ephemeral. Services use label selectors to dynamically route traffic to matching pods, ensuring high availability and load balancing.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Ingress
Why it's wrong here
Ingress manages external access to services, typically HTTP.
EndpointSlice
Why it's wrong here
EndpointSlice tracks network endpoints of Services, but is not the stable endpoint itself.
Service
Why this is correct
A Service provides a stable IP and DNS name to reach a group of pods.
Related concept
Read the scenario before looking for a memorised answer.
NetworkPolicy
Why it's wrong here
NetworkPolicy controls traffic flow, not service discovery.
Common exam traps
The trap here is that candidates often confuse Ingress (which provides external access) with the internal stable IP/DNS abstraction provided by a Service, or they mistakenly think EndpointSlice (a newer, more scalable replacement for Endpoints) is the resource that offers a stable network identity.
Detailed technical explanation
Under the hood, a Service of type ClusterIP (the default) is assigned a virtual IP from a predefined range (e.g., 10.96.0.0/12) by the kube-apiserver, and kube-proxy on each node implements iptables or IPVS rules to load-balance traffic to the pod endpoints. The DNS name is managed by CoreDNS, which watches Services and creates A/AAAA records; this enables service discovery via DNS SRV records for named ports. A real-world scenario where this matters is in microservices architectures where pods are frequently rescheduled due to rolling updates or node failures—clients can rely on the Service DNS name without code changes.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A practitioner preparing for the KCNA exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
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FAQ
Kubernetes Fundamentals — This question tests Kubernetes Fundamentals — Read the scenario before looking for a memorised answer..
The correct answer is: Service — Option C is correct because a Kubernetes Service provides a stable virtual IP address and a DNS name (e.g., my-svc.namespace.svc.cluster.local) that remains constant even as the underlying pods are created, destroyed, or scaled. This abstraction allows clients to reliably reach a set of pods without needing to track individual pod IPs, which are ephemeral. Services use label selectors to dynamically route traffic to matching pods, ensuring high availability and load balancing.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 24, 2026
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.
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