KCSA Exam Dumps | Why mightNetworkPolicyresources have no effect in a Kubernetes cluster?

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LinuxFoundation.KCSA.v2025-12-26.q28
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Question 24/28

Why mightNetworkPolicyresources have no effect in a Kubernetes cluster?

A. NetworkPolicy resources are only enforced if the Kubernetes scheduler supports them.

B. NetworkPolicy resources are only enforced if the networking plugin supports them.

C. NetworkPolicy resources are only enforced for unprivileged Pods.

D. NetworkPolicy resources are only enforced if the user has the right RBAC permissions.

Correct Answer: B

* NetworkPolicies define how Pods can communicate with each other and external endpoints.
* However, Kubernetes itselfdoes not enforce NetworkPolicy. Enforcement depends on theCNI plugin used (e.g., Calico, Cilium, Kube-Router, Weave Net).
* If a cluster is using a network plugin that does not support NetworkPolicies, then creating NetworkPolicy objects hasno effect.
References:
Kubernetes Documentation - Network Policies
CNCF Security Whitepaper - Platform security section: notes that security enforcement relies on CNI capabilities.

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