This CKAD practice question tests your understanding of services and networking. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 items are required for Ingress to work correctly in a Kubernetes cluster?
At least one rule specifying either host or path
Rules define how to route traffic.
An Ingress controller running in the cluster
Ingress is just a set of rules; the controller implements them.
A TLS secret for HTTPS termination
Required if TLS is specified in the Ingress spec.
A LoadBalancer service for the backend
Why wrong: Backend service can be ClusterIP.
A default backend service
Why wrong: Optional, not required.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
At least one rule specifying either host or path
An Ingress resource needs an Ingress controller to process it. Rules define routing. TLS configuration enables HTTPS. IngressClass is optional but recommended. Backend service must be of type ClusterIP.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
At least one rule specifying either host or path
Why this is correct
Rules define how to route traffic.
Related concept
Static NAT maps one inside address to one outside address.
An Ingress controller running in the cluster
Why this is correct
Ingress is just a set of rules; the controller implements them.
Related concept
Static NAT maps one inside address to one outside address.
A TLS secret for HTTPS termination
A LoadBalancer service for the backend
Why it's wrong here
Backend service can be ClusterIP.
A default backend service
Why it's wrong here
Optional, not required.
Common exam traps
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
What to study next
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related CKAD NAT questions on configuration and troubleshooting.
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FAQ
Services and Networking — This question tests Services and Networking — Static NAT maps one inside address to one outside address..
The correct answer is: At least one rule specifying either host or path — An Ingress resource needs an Ingress controller to process it. Rules define routing. TLS configuration enables HTTPS. IngressClass is optional but recommended. Backend service must be of type ClusterIP.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related CKAD NAT questions on configuration and troubleshooting.
Static NAT maps one inside address to one outside address.
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Last reviewed: Jun 21, 2026
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