This CKS practice question tests your understanding of cluster setup and hardening. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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.
A cluster has been hardened by setting --anonymous-auth=false and enabling RBAC. However, kube-bench still reports a failure for the kubelet check 'Ensure that the --anonymous-auth argument is set to false'. What could be the reason?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The kubelet configuration file does not set --anonymous-auth=false
The kubelet can have its authentication settings configured either via command-line arguments or via a KubeletConfiguration file. If the kubelet configuration file does not explicitly set `authentication.anonymous.enabled` to `false`, the kubelet may still allow anonymous access even if the `--anonymous-auth=false` argument is passed on the command line, because the configuration file takes precedence over command-line flags. kube-bench checks the effective configuration, so if the file overrides the flag, the check fails.
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.
✓
The kubelet configuration file does not set --anonymous-auth=false
Why this is correct
kube-bench checks kubelet flags, which must be set independently.
Related concept
Read the scenario before looking for a memorised answer.
✗
The API server is running with --authorization-mode=AlwaysAllow
Why it's wrong here
This is about the API server, not kubelet.
✗
The kubelet is using a self-signed certificate
Why it's wrong here
Self-signed certificates are not related to anonymous auth.
✗
The NodeRestriction admission plugin is not enabled
Why it's wrong here
NodeRestriction does not affect anonymous auth on kubelet.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates assume command-line flags always override the kubelet configuration file, but in reality the configuration file takes precedence for kubelet settings, so both must be set consistently.
Detailed technical explanation
How to think about this question
When a kubelet starts, it first loads the KubeletConfiguration file (specified by `--config`), and then command-line flags are applied as overrides. However, for boolean flags like `--anonymous-auth`, if the configuration file explicitly sets `authentication.anonymous.enabled: true`, the command-line flag `--anonymous-auth=false` is ignored because the configuration file value is authoritative. This is a common misconfiguration where administrators set the flag but forget to update the configuration file, leading to a false sense of security.
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 junior network technician can log in to a core router but cannot reach the enable prompt or configuration mode. The AAA server is authenticating the login — but the authorisation policy only grants privilege level 1, not 15. Authentication (who you are) is working; authorisation (what you can do) is not.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this CKS question in full detail.
Cluster Setup and Hardening — This question tests Cluster Setup and Hardening — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The kubelet configuration file does not set --anonymous-auth=false — The kubelet can have its authentication settings configured either via command-line arguments or via a KubeletConfiguration file. If the kubelet configuration file does not explicitly set `authentication.anonymous.enabled` to `false`, the kubelet may still allow anonymous access even if the `--anonymous-auth=false` argument is passed on the command line, because the configuration file takes precedence over command-line flags. kube-bench checks the effective configuration, so if the file overrides the flag, the check fails.
What should I do if I get this CKS 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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