Question 61
What is the English name of the Internet of Things ()?
Question 62
Which of the following technologies is used for NB-IoT uplink and downlink respectively?
Question 63
In the MQTT protocol, the payload of a PUBLISH message is the application message to be published.
Question 64
When a northbound application calls the authentication interface, what parameter is required ()?
Question 65
In the MQTT protocol, a reserved message whose payload contains zero bytes cannot be reserved on the server.