CWIIP Practice Questions - CWNP Certified Wireless IoT Integration Professional (CWIIP-302) Exam

In MQTT, what does QoS level 0 guarantee for message delivery?

At most once delivery with no acknowledgment Exactly once delivery with a four-step handshake At least once delivery with PUBACK Guaranteed in-order delivery

Correct Answer:

At most once delivery with no acknowledgment

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