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31. MQTT was introduced by
Yahoo
Google
IBM
CISCO
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32. Which of the following is an extension of MQTT, which uses encryption based on lightweight attribute based encryption?
RSA MQTT
Secure MQTT
Encrypto-MQTT
DES MQTT
33. RPL supports:
Message confidentiality
Loop detection in the routes
Data path validation
All of these
34. Representational State Transfer (REST) is the standard interface between
Two machines in a LAN
HTTP client and user
HTTP client and servers
None of the above
35. Which of the following is not a messaging mode in CoAP?
Confirmable
Separate
Direct
Piggyback
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