The MQTT protocol adopts a request/response working mode, and the client subscribes to the server for information of interest

• A.False
• B.True

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When the terminal is in PSM (power saving mode), the control commands issued by the service platform cannot reach the terminal in real time. The downlink control commands need to be cached in the operator's () first?

• A.IoT platform
• B.Core network
• C.Business platform
• D.base station

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What kinds of AT commands are divided into

• A.Testing
• B.Inquiry
• C.Settings
• D.Execution

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1.CityConnectAgileController uses network cable to connect directly through which connection for communication access?

• A.XML-RPC
• B.REST
• C.WSS
• D.SOAP

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What are the common scenarios for issuing control commands in Internet of Vehicles applications ()? (multiple choice)

• A.Position information query
• B.Position information report
• C.Acquisition module software version
• D.lock the car

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