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CKA study material · question 13 of 1000

How does kube-proxy handle Service traffic when the operating system offers a packet filtering layer?

  1. It delegates the decision to the container runtime
  2. It refuses to start and logs an error
  3. It forwards every packet in user space regardless
  4. It uses that packet filtering layer
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Answer: D. It uses that packet filtering layer

kube-proxy uses the OS packet filtering layer when available and only forwards traffic itself when there is none.

Source: Cluster Architecture (Kubernetes) — Node components › kube-proxy (optional)

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