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CKA study material · question 755 of 1000

Which protocols must be permitted for the NodePort range on a worker node?

  1. TCP only
  2. TCP and UDP
  3. TCP and SCTP
  4. UDP only
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Answer: B. TCP and UDP

The documented worker node ports list 30000-32767 for NodePort Services over both TCP and UDP, since a Service port may declare either protocol.

Source: Ports and Protocols (Kubernetes) — Worker node(s)

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