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 kubectl flag disables anonymous authentication on the API server?
--anonymous-enabled=false
Why wrong: Incorrect flag syntax; the correct flag is --anonymous-auth=false.
--no-anonymous
Why wrong: Not a valid kube-apiserver flag.
--anonymous-auth=false
Correct flag to disable anonymous authentication.
--disable-anonymous
Why wrong: Not a valid kube-apiserver 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
Option C is correct because the kube-apiserver uses the `--anonymous-auth` flag to control whether anonymous requests are allowed. Setting `--anonymous-auth=false` disables anonymous authentication, meaning the API server will reject requests that do not present valid credentials. This is a critical hardening step to ensure only authenticated users can access the cluster.
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.
--anonymous-enabled=false
Why it's wrong here
Incorrect flag syntax; the correct flag is --anonymous-auth=false.
--no-anonymous
Why it's wrong here
Not a valid kube-apiserver flag.
--anonymous-auth=false
Why this is correct
Correct flag to disable anonymous authentication.
Related concept
Read the scenario before looking for a memorised answer.
--disable-anonymous
Why it's wrong here
Not a valid kube-apiserver flag.
Common exam traps
The trap here is that candidates may confuse the `--anonymous-auth` flag with other authentication-related flags or invent plausible-sounding flag names like `--disable-anonymous`, while the actual flag uses the `--<setting>-auth` naming convention with a boolean value.
Detailed technical explanation
The `--anonymous-auth` flag defaults to `true` in Kubernetes, allowing unauthenticated requests to be treated as anonymous users with system:anonymous identity. When set to `false`, the API server returns HTTP 401 Unauthorized for any request without valid credentials, which is essential for compliance with security standards like CIS Benchmark (recommendation 1.2.1). This flag is typically set in the kube-apiserver static pod manifest or kube-apiserver.yaml configuration file.
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
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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 — Option C is correct because the kube-apiserver uses the `--anonymous-auth` flag to control whether anonymous requests are allowed. Setting `--anonymous-auth=false` disables anonymous authentication, meaning the API server will reject requests that do not present valid credentials. This is a critical hardening step to ensure only authenticated users can access the cluster.
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 24, 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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