This CKA practice question tests your understanding of cluster architecture, installation and configuration. 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 component is responsible for maintaining network rules on each worker node to enable service discovery and load balancing?
kube-controller-manager
Why wrong: The controller manager runs controllers, not network rules.
CoreDNS
Why wrong: CoreDNS provides DNS services, not network rules.
kube-proxy
kube-proxy implements the Service concept by maintaining network rules on nodes.
kubelet
Why wrong: kubelet is the node agent that manages pods.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
kube-proxy
kube-proxy is the component responsible for maintaining network rules on each worker node. It implements the Kubernetes Service concept by managing IP tables or IPVS rules to route traffic to the correct Pods, enabling service discovery and load balancing across Pod endpoints.
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.
kube-controller-manager
Why it's wrong here
The controller manager runs controllers, not network rules.
CoreDNS
Why it's wrong here
CoreDNS provides DNS services, not network rules.
kube-proxy
Why this is correct
kube-proxy implements the Service concept by maintaining network rules on nodes.
Related concept
Read the scenario before looking for a memorised answer.
kubelet
Why it's wrong here
kubelet is the node agent that manages pods.
Common exam traps
The trap here is confusing the responsibility for DNS-based service discovery (CoreDNS) with the responsibility for network-level traffic routing and load balancing (kube-proxy), leading candidates to incorrectly select CoreDNS.
Detailed technical explanation
kube-proxy watches the Kubernetes API server for Service and EndpointSlice changes, then updates iptables (or IPVS) rules on the node to redirect traffic destined for a Service's ClusterIP to a healthy backend Pod. In iptables mode, it uses DNAT rules with random or round-robin selection; in IPVS mode, it supports more sophisticated scheduling algorithms like least connections. A subtle behavior is that kube-proxy does not handle DNS resolution—that is CoreDNS's role—so both components work together for full service discovery and load balancing.
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 CKA 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
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Cluster Architecture, Installation and Configuration — study guide chapter
Learn the concepts, then practise the questions
Cluster Architecture, Installation and Configuration practice questions
Targeted practice on this topic area only
All CKA questions
1,005 questions across all exam domains
Certified Kubernetes Administrator CKA study guide
Full concept coverage aligned to exam objectives
CKA practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Practise CKA questions linked to Cluster Architecture, Installation and Configuration.
Practise CKA questions linked to Services and Networking.
Practise CKA questions linked to Workloads and Scheduling.
Practise CKA questions linked to Storage.
Practise CKA questions linked to Troubleshooting.
Practise CKA questions linked to Cluster Architecture, Installation & Configuration.
Practise CKA questions linked to Workloads & Scheduling.
Practise CKA questions linked to Services & Networking.
Practise CKA questions linked to CKA fundamentals.
Practise CKA questions linked to CKA scenario.
Practise CKA questions linked to CKA troubleshooting.
Practice this exam
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
Cluster Architecture, Installation and Configuration — This question tests Cluster Architecture, Installation and Configuration — Read the scenario before looking for a memorised answer..
The correct answer is: kube-proxy — kube-proxy is the component responsible for maintaining network rules on each worker node. It implements the Kubernetes Service concept by managing IP tables or IPVS rules to route traffic to the correct Pods, enabling service discovery and load balancing across Pod endpoints.
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.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Keep practising
Last reviewed: Jun 24, 2026
This CKA 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 CKA exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.