CIoTP Practice Questions - CertNexus Certified Internet Of Things Practitioner (CIoTP) Exam

What is the purpose of the MQTT 'retain' flag on a published message?

It encrypts the message payload before sending It instructs the broker to store the message and deliver it to any future subscriber of that topic It prevents the broker from logging the message It forces the message to be delivered with QoS 2

Correct Answer:

It instructs the broker to store the message and deliver it to any future subscriber of that topic

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