Which of the following protocols does not exist at the data link layer?

Internet Of Things - Quiz(MCQ)

LoRaWAN

WirelessHART

Secure MQTT

ZigBee Smart Energy

Correct Answer : Secure MQTT

Explanation : Secure MQTT is a session layer protocol. It is an extended version of the MQTT protocol that uses encryption based on lightweight attribute-based encryption.

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Which challenge comes under IoT devices, reliable bidirectional signaling.

Security

Signaling

Presence detection

Power consumption

Correct Answer : Signaling

Explanation : With connected IoT devices, reliable bidirectional signaling is essential for collecting and routing data between devices.

Which service enables the user to periodically invoke an already defined IoT service?

Poll for the report

Get service

Get available services

Service updated resources

Correct Answer : Poll for the report

Explanation : Poll for the report service enables the user to periodically invoke an already defined IoT service within specified time intervals.

______ are the general feature of our brain's perception.

Interact

Research

Strobes

Constant

Correct Answer : Strobes

Explanation : Evidence gathered from the finding of a landmark Australian Italian collaboration suggests that oscillations or strobes are a general feature of our brains perception.