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CKA study material · question 880 of 1000

A Pod cannot reach itself through its own Service IP. Which two hairpin-mode values allow that to work? Choose two.

  1. hairpin-veth
  2. none
  3. promiscuous-bridge
  4. masquerade-all
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Answer: A. hairpin-veth
C. promiscuous-bridge

The kubelet's hairpin-mode must be hairpin-veth or promiscuous-bridge for a Service endpoint to load balance back to itself.

Source: Debug Services (Kubernetes) — Edge case: A Pod fails to reach itself via the Service IP

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