This CKS practice question tests your understanding of system hardening. 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.
You need to apply a seccomp profile to all containers in a pod. The profile is named 'custom-profile.json' and is stored on each node at /var/lib/kubelet/seccomp/. Complete the following YAML snippet:
```yaml apiVersion: v1 kind: Pod metadata: name: secure-pod spec: securityContext: seccompProfile: type: Localhost localhostProfile: ??? ``` What should replace ???
custom-profile.json
The localhostProfile field expects the filename relative to the seccomp directory.
localhost/custom-profile.json
Why wrong: The value should be just the filename, not a path with 'localhost'.
profile: custom-profile.json
Why wrong: The field name is 'localhostProfile', not 'profile'.
/var/lib/kubelet/seccomp/custom-profile.json
Why wrong: The path should be relative, not absolute.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
custom-profile.json
The 'localhostProfile' field should contain the filename of the profile relative to the seccomp directory on the node. The full path is /var/lib/kubelet/seccomp/custom-profile.json, so the value should be 'custom-profile.json'. Option A is correct. Option B is incorrect because it includes the full path, which is not needed. Option C is incorrect because 'localhost' is not a valid type. Option D is incorrect because the field is 'localhostProfile', not 'profile'.
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.
custom-profile.json
Why this is correct
The localhostProfile field expects the filename relative to the seccomp directory.
Related concept
Static NAT maps one inside address to one outside address.
localhost/custom-profile.json
Why it's wrong here
The value should be just the filename, not a path with 'localhost'.
profile: custom-profile.json
Why it's wrong here
The field name is 'localhostProfile', not 'profile'.
/var/lib/kubelet/seccomp/custom-profile.json
Why it's wrong here
The path should be relative, not absolute.
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 CKS NAT questions on configuration and troubleshooting.
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FAQ
System Hardening — This question tests System Hardening — Static NAT maps one inside address to one outside address..
The correct answer is: custom-profile.json — The 'localhostProfile' field should contain the filename of the profile relative to the seccomp directory on the node. The full path is /var/lib/kubelet/seccomp/custom-profile.json, so the value should be 'custom-profile.json'. Option A is correct. Option B is incorrect because it includes the full path, which is not needed. Option C is incorrect because 'localhost' is not a valid type. Option D is incorrect because the field is 'localhostProfile', not 'profile'.
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 CKS 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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