mediumMultiple ChoiceObjective-mapped
CKS Kubelet authentication Practice Question
Which flag must be set on the kubelet to prevent it from using the default namespace for pods and to enforce that pods only use namespaces that match the node's assigned namespace?
⚠ Common exam trap
A common trap is assuming that a specific kubelet flag exists for namespace enforcement. In reality, no such flag exists; namespace restrictions are enforced by the API server's NodeRestriction admission plugin, not by kubelet flags.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
--authentication-token-webhook=true
The kubelet does not have a flag to directly enforce that pods only use namespaces matching the node's assigned namespace. Namespace enforcement for pods on a node is part of the NodeRestriction admission plugin on the API server, which restricts kubelet's ability to only update pods bound to its node. None of the listed kubelet flags provide this functionality. --authentication-token-webhook=true enables token authentication but does not enforce namespace restrictions.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
--protect-kernel-defaults=true
Why it's wrong here
--protect-kernel-defaults is a kubelet flag for kernel tuning, unrelated to namespace enforcement.
- ✗
--namespace-default=restricted
Why it's wrong here
--namespace-default is not a valid kubelet flag.
- ✓
--authentication-token-webhook=true
Why this is correct
--authentication-token-webhook enables token authentication, not namespace enforcement.
- ✗
--anonymous-auth=false
Why it's wrong here
--anonymous-auth disables anonymous requests, but does not enforce namespace restrictions.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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