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QusWhich of the following protocols does not exist at the data link layer? Qusनिम्न में से कौन सा प्रोटोकॉल डेटा लिंक परत पर मौजूद नहीं है?

A. ZigBee Smart Energy
B. LoRaWAN
C. Wireless HART
D. Secure MQTT


Solution
D. Secure MQTT



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