Consul 1.15 Multi Datacenter Federation Practice Question

Which protocol do Consul servers use to maintain the WAN gossip pool?

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

✓

Serf (SWIM)

Consul uses the Serf library, which implements the SWIM-based gossip protocol for both LAN and WAN communication.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

✗
gRPC
Why it's wrong here
gRPC is used for xDS and mesh traffic.
✗
DNS
Why it's wrong here
DNS is for service resolution.
✓
Serf (SWIM)
Why this is correct
Consul uses Serf/SWIM for membership and gossip.
✗
HTTP
Why it's wrong here
HTTP is for the API.

About these practice questions

One of 194 original Consul 1.15 practice questions on Courseiva, each with a full explanation and wrong-answer analysis — not exam dumps or protected exam content. Learn why practice questions differ from exam dumps →

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Last reviewed August 2026 · checked against the official HashiCorp exam blueprint

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