Internet of Things Communication Layers Quiz
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Questions and Answers

What is MQTT's primary advantage in constrained sensor networks?

  • It provides advanced security services (correct)
  • It is robust and reliable
  • It is heavy and complex
  • It relies heavily on the Perception Layer

Which layer is responsible for analyzing and processing data in MQTT implementations?

  • Transport Layer
  • Application Layer (correct)
  • Transmission Layer
  • Perception Layer

Why is CoAP considered suitable for constrained nodes and networks?

  • It relies on the Transmission Layer
  • It lacks advanced security features
  • It is a heavyweight protocol
  • It can transform data for further processing (correct)

What kind of actions can CoAP enable by handling data for applications?

<p>Control actuators (B)</p> Signup and view all the answers

In critical infrastructures, why might MQTT be preferred for applications with sensitive information?

<p>It can offer advanced security services (B)</p> Signup and view all the answers

What differentiates CoAP from other protocols like MQTT in terms of application suitability?

<p>Specialized web transfer protocol (C)</p> Signup and view all the answers

What sets smart sensors used in IoT apart from traditional sensors?

<p>They include an integrated microprocessor (DMP). (B)</p> Signup and view all the answers

Which factor is crucial for defining a reference architecture that supports IoT features and future extensions?

<p>Security, interoperability, and scalability (B)</p> Signup and view all the answers

How are smart sensors transformed before being forwarded to other devices in the network?

<p>By normalizing the data and filtering noise (B)</p> Signup and view all the answers

Which type of actuators can interact with different devices through a network in an autonomous car system?

<p>Various types of actuators (C)</p> Signup and view all the answers

What is one reason why more interoperability is required in the implementation of IoT technologies?

<p>To ensure seamless communication between devices (B)</p> Signup and view all the answers

What technology can use data to control or monitor an autonomous car according to the text?

<p>RFID tags (A)</p> Signup and view all the answers

What is the purpose of the Perception layer in IoT?

<p>Converting data collected by physical devices into digital data (A)</p> Signup and view all the answers

Why is the use of a gateway important in IoT implementations?

<p>To handle sensors and initiate multiple actions based on the data received (C)</p> Signup and view all the answers

What role do sensors play in an IoT system?

<p>Acting as a medium between the physical and digital world (D)</p> Signup and view all the answers

What is the main function of the Network/Transmission layer in an IoT system?

<p>Converting digital data into physical signals for transmission (D)</p> Signup and view all the answers

Why can't the layers in IoT be considered as protocol sub-layers for application communication?

<p>They focus on elementary operations rather than communication protocols (A)</p> Signup and view all the answers

What is a significant feature of WiFi as a communication technology in IoT applications?

<p>Bi-directional communication capability (D)</p> Signup and view all the answers

What is the purpose of Transport Layer Security (TLS) mentioned in the text?

<p>Providing secure messaging over the internet (C)</p> Signup and view all the answers

Which technology is specifically designed for large-scale wireless device networks, providing positioning services with high accuracy?

<p>Datagram Transport Layer Security (DTLS) (A)</p> Signup and view all the answers

What is the role of Datagram Transport Layer Security (DTLS) as described in the text?

<p>Fixing problems related to packet loss and reordering (D)</p> Signup and view all the answers

Which protocol is specifically associated with transporting messages between two processes?

<p>Transport Layer Security (TLS) (D)</p> Signup and view all the answers

What distinguishes Datagram Transport Layer Security (DTLS) from the traditional TLS protocol?

<p>Direct usability in datagram environments (C)</p> Signup and view all the answers

What technology is known for its significant enhancements to reliability and analogously to ZigBee?

<p>IPv6 Routing Protocol (RPL) (D)</p> Signup and view all the answers

What is the advantage of using blacktooth covers in IoT security?

<p>Low power consumption and energy constraints (A)</p> Signup and view all the answers

In the context of IoT, what is the purpose of Destination Oriented Directed Acyclic Graph (DODAG)?

<p>Facilitating data routing for sensors and devices with constraints (B)</p> Signup and view all the answers

Which wireless protocol is specifically designed for home automation?

<p>ZigBee (D)</p> Signup and view all the answers

What is the key characteristic of LoRaWAN as an LPWA networking protocol?

<p>Bi-directional communication capability (C)</p> Signup and view all the answers

Which network protocol is discussed as having security-related features and problems in IoT applications?

<p>LoRaWAN (D)</p> Signup and view all the answers

In IoT, what do smart objects primarily do?

<p>Transmit digital data collected from physical devices (C)</p> Signup and view all the answers

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