i) Flag bits in all MQTT flows must be zero unless specified otherwise.
ii) Server MUST check that they are zero and disconnect the client if they are not zero.
iii) All of these bits are reserved for future use.
i) Flag bits in all MQTT flows must be zero unless specified otherwise.
ii) Server MUST check that they are zero and disconnect the client if they are not zero.
iii) All of these bits are reserved for future use.