This CKS practice question tests your understanding of cluster setup and 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.
Which kubelet flag prevents the kubelet from serving anonymous requests?
--authentication-anonymous=false
Why wrong: Not a valid flag.
--anonymous-auth=false
This flag disables anonymous authentication on the kubelet.
--enable-anonymous=false
Why wrong: Not a valid flag.
--anonymous-requests=false
Why wrong: Not a valid flag.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
--anonymous-auth=false
The kubelet flag `--anonymous-auth=false` disables anonymous authentication, preventing unauthenticated requests from being served. By default, anonymous requests are enabled (`--anonymous-auth=true`), which allows any user without credentials to access the kubelet API. Setting this flag to `false` enforces authentication for all requests, a critical hardening step for cluster security.
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.
--authentication-anonymous=false
Why it's wrong here
Not a valid flag.
--anonymous-auth=false
Why this is correct
This flag disables anonymous authentication on the kubelet.
Related concept
Read the scenario before looking for a memorised answer.
--enable-anonymous=false
Why it's wrong here
Not a valid flag.
--anonymous-requests=false
Why it's wrong here
Not a valid flag.
Common exam traps
CNCF often tests the exact flag name `--anonymous-auth` versus similar-sounding alternatives like `--authentication-anonymous` or `--enable-anonymous`, exploiting candidates' tendency to guess based on generic naming patterns rather than precise Kubernetes documentation.
Detailed technical explanation
The kubelet's authentication module supports multiple authenticators, including x509 client certificates, bearer tokens, and anonymous access. When `--anonymous-auth=false` is set, the kubelet rejects requests without valid credentials with a 401 Unauthorized response, preventing anonymous users from accessing endpoints like `/pods`, `/exec`, or `/metrics`. In a real-world scenario, an attacker could exploit anonymous access to enumerate pods or execute commands if this flag is left at its default `true` value.
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 CKS 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.
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FAQ
Cluster Setup and Hardening — This question tests Cluster Setup and Hardening — Read the scenario before looking for a memorised answer..
The correct answer is: --anonymous-auth=false — The kubelet flag `--anonymous-auth=false` disables anonymous authentication, preventing unauthenticated requests from being served. By default, anonymous requests are enabled (`--anonymous-auth=true`), which allows any user without credentials to access the kubelet API. Setting this flag to `false` enforces authentication for all requests, a critical hardening step for cluster security.
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.
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Last reviewed: Jun 30, 2026
This CKS 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 CKS exam.
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