This CKAD practice question tests your understanding of services and networking. 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 THREE components are required for a basic Ingress to route HTTP traffic to a Service? (Choose three.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
A Service of type ClusterIP or NodePort
A Service of type ClusterIP or NodePort is required because the Ingress resource routes external HTTP traffic to a Service, which then forwards it to the Pods. ClusterIP is the default and most common type for internal cluster routing, while NodePort can also be used but is less typical. Without a Service, the Ingress has no endpoint to direct traffic to.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
A Deployment of the application
Why it's wrong here
The Ingress routes to a Service, not directly to a Deployment.
✓
A Service of type ClusterIP or NodePort
Why this is correct
The Ingress forwards traffic to a Service.
Related concept
Read the scenario before looking for a memorised answer.
✗
A NetworkPolicy allowing traffic from the Ingress controller
Why it's wrong here
Not required for basic routing, though may be needed for security.
✓
An Ingress resource YAML file
Why this is correct
Defines the routing rules.
Related concept
Read the scenario before looking for a memorised answer.
✓
An Ingress controller (e.g., nginx-ingress)
Why this is correct
The controller implements the Ingress rules.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
CNCF often tests the misconception that a Deployment is mandatory for Ingress to work, but the Ingress only requires a Service to route to, and the underlying Pods can be created by any workload resource (e.g., a ReplicaSet or even a standalone Pod).
Detailed technical explanation
How to think about this question
Under the hood, an Ingress controller (e.g., nginx-ingress) runs as a reverse proxy that watches the Kubernetes API for Ingress resources and dynamically updates its configuration (e.g., nginx.conf) to route traffic based on hostnames and paths. The Ingress resource itself is a set of rules that define how HTTP/HTTPS requests should be forwarded to Services, which then use kube-proxy to distribute traffic to Pod endpoints via iptables or IPVS. A real-world scenario: if you omit the Service, the Ingress controller will have no endpoints to proxy to, resulting in a 503 error.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the CKAD 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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this CKAD question in full detail.
Services and Networking — This question tests Services and Networking — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: A Service of type ClusterIP or NodePort — A Service of type ClusterIP or NodePort is required because the Ingress resource routes external HTTP traffic to a Service, which then forwards it to the Pods. ClusterIP is the default and most common type for internal cluster routing, while NodePort can also be used but is less typical. Without a Service, the Ingress has no endpoint to direct traffic to.
What should I do if I get this CKAD question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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