Exam 312-50v13 topic 1 question 79 discussion

Correct: D (Zigbee) Options: A) LPWAN's long range varies from 2 km to 1,000 km, depending on the technology. Low-power WAN (LPWAN) is a wireless wide area network technology that interconnects low-bandwidth, battery-powered devices with low bit rates over long ranges. B) MQTT = lightweight publish/subscribe messaging protocol designed for M2M (machine to machine) telemetry in low bandwidth environments. Most gateway protocols such as ZigBee and LoRa can be converted into MQTT Protocol to connect to the Cloud. C) NB-IoT = novel cellular technology developed by the 3GPP standardization organization. It is a type of Low Power Wide Area (LPWA) IoT connectivity, primarily designed for connecting terminals with limited bandwidth resources. D) Zigbee = ZigBee is a mesh-network wireless protocol for building and home automation applications. Mainly used for LAN connection, The range of communication between adjacent nodes is typically 10 to 100 meters. By increasing the transmitting power, the range can be extended up to 1 to 3 kilometers. https://www.emqx.com/en/blog/iot-protocols-mqtt-coap-lwm2m#5-mqtt