only publisher to broker
only broker to publisher
publisher to broker and broker topublisher
server to client
Answer is Right!
Answer is Wrong!
The correct answer is: C. publisher to broker and broker to publisher.
A publish command message is sent from a publisher to a broker, and the broker then sends the message to all subscribers.
Option A is incorrect because the broker does not send the message to the publisher.
Option B is incorrect because the publisher does not send the message to the broker.
Option D is incorrect because the server does not send the message to the client.