Question

Which of the following controls the publish-subscribe messaging pattern in MQTT.
a. MQTT broker
b. MQTT client
c. MQTT server
d. None of these

Answer 1

MQTT broker... option a

Answer 2

Publish–subscribe: A messaging pattern where publishers don't send the messages directly to the subscribers.

They configure in such a way that it categorizes published messages into classes.

These classes are used by the subscribers.

This is not known to the subscribers.

It decouples the sender and the receiver.

MQTT broker: The clients connect and communicate with a server called as the broker.

The broker provides the messaging patterns required for communication between the client and the server in the publish subscribe system.

Hence, (a) MQTT broker is the answer.