CoAP Protocol Overview
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Questions and Answers

What is the primary function of a Z-Wave hub in a Z-Wave network?

  • Control Bluetooth devices
  • Connect to the internet
  • Support IoT devices wirelessly
  • Receive commands from smart home applications on user device (correct)

    • How do Z-Wave signals reach the intended device in a Z-Wave network?

  • Through direct transmission
  • By connecting to a smart home hub
  • By using Wi-Fi routers
  • Via hopping through other Z-Wave devices (correct)

    • What differentiates Z-Wave from Wi-Fi in terms of range and power consumption?

  • Z-Wave has a longer range and lower power consumption (correct)
  • Wi-Fi has a longer range but higher power consumption
  • Z-Wave has a shorter range but higher power consumption
  • Wi-Fi has a shorter range and lower power consumption

    • What best describes the communication technology used by Z-Wave networks?

    <p>Mesh network technology (A)</p> Signup and view all the answers

    In a Z-Wave network, what is the maximum number of devices a command can hop through before reaching its destination device?

    <p>4 devices (C)</p> Signup and view all the answers

    What is the recommended distance for placing Z-Wave devices from each other to ensure signal strength?

    <p>50 feet apart (A)</p> Signup and view all the answers

    What is one of the key features of Zigbee 3.0 networks?

    <p>Support for up to 65,000 nodes per network (A)</p> Signup and view all the answers

    How does connecting Zigbee 3.0 networks to the IP domain enhance functionality?

    <p>Opens up wireless monitoring and control from a variety of devices on LAN, WAN, and the Internet (A)</p> Signup and view all the answers

    What type of network topologies does Zigbee support?

    <p>Multiple topologies including point-to-point, point-to-multipoint, and mesh networks (A)</p> Signup and view all the answers

    What security feature does Zigbee employ for data connections?

    <p>128-bit AES encryption (C)</p> Signup and view all the answers

    What potential advantage does the Zigbee protocol offer for battery-operated devices?

    <p>Battery life lasting several years (C)</p> Signup and view all the answers

    What is the primary function of the application layer in the IoT architecture?

    <p>Communicating directly with users (D)</p> Signup and view all the answers

    Which layer in the IoT architecture is responsible for examining and interpreting data from IoT devices?

    <p>Data processing layer (D)</p> Signup and view all the answers

    What is the role of middleware services in the application layer of IoT architecture?

    <p>Enabling communication between IoT systems (A)</p> Signup and view all the answers

    Which component of the IoT architecture is in charge of gathering data from physical object sensors and actuators?

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

    What distinguishes the application layer from the data processing layer in the IoT architecture?

    <p>The application layer enables communication with users while the data processing layer interprets data. (B)</p> Signup and view all the answers

    In the context of IoT architecture, what is the function of the information processing layer?

    <p>Making decisions through analytics (B)</p> Signup and view all the answers

    What is the main responsibility of the Sensing Layer in the IoT architecture?

    <p>Gathering data from various sources (D)</p> Signup and view all the answers

    Which layer of the IoT architecture is primarily focused on establishing connectivity and communication?

    <p>Network Layer (C)</p> Signup and view all the answers

    What is a communication protocol in the context of IoT?

    <p>A system that enables information exchange between entities (D)</p> Signup and view all the answers

    Which of the following is NOT a network technology commonly used in IoT?

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

    What distinguishes the Sensing Layer from the Communication Layer in IoT architecture?

    <p>The Sensing Layer focuses on data collection, while the Communication Layer focuses on transmitting data (D)</p> Signup and view all the answers

    Which of the following communication protocols is specifically designed for resource-constrained devices in the Internet of Things?

    <p>Constrained Application Protocol (CoAP) (C)</p> Signup and view all the answers

    What is the main difference between a microcontroller (MCU) and a microprocessor (MPU)?

    <p>MCU has all necessary basic peripherals on one chip while MPU requires additional peripherals (A)</p> Signup and view all the answers

    Which statement is true about microcontrollers (MCUs) in comparison to microprocessors (MPUs)?

    <p>MCUs are less sophisticated and have limited functionality (C)</p> Signup and view all the answers

    Why are microcontrollers (MCUs) often referred to as 'system on a chip' (SoC)?

    <p>Because they have all necessary basic peripherals on a single chip (A)</p> Signup and view all the answers

    In terms of functionality, how do microprocessors (MPUs) generally differ from microcontrollers (MCUs)?

    <p>MPUs are multipurpose and require additional components for operation (A)</p> Signup and view all the answers

    What is the primary reason that microcontrollers (MCUs) are usually dedicated to perform a single defined function?

    <p>To prevent overloading the integrated circuits (A)</p> Signup and view all the answers

    Which feature of microprocessors (MPUs) distinguishes them from microcontrollers (MCUs)?

    <p>Requiring additional components and I/O for operation (B)</p> Signup and view all the answers

    Which of the following best describes the purpose of Bluetooth Low Energy (BLE) compared to Classic Bluetooth?

    <p>Providing reduced power consumption and cost (A)</p> Signup and view all the answers

    How does a BLE central device differ from a peripheral device in its role within a connection-oriented communication?

    <p>A central device initiates requests for connection (D)</p> Signup and view all the answers

    What distinguishes 6LoWPAN from Bluetooth Low Energy (BLE) in terms of device interaction?

    <p>6LoWPAN supports interaction with 802.15.4 devices (A)</p> Signup and view all the answers

    In the context of BLE technology, what is meant by the 'exchange' step in the communication process?

    <p>Data sharing between connected devices (A)</p> Signup and view all the answers

    How does a peripheral device in a BLE connection differ from a central device when establishing communication?

    <p>Can receive commands from the central device (B)</p> Signup and view all the answers

    What distinguishes BLE from Classic Bluetooth in terms of their intended power consumption?

    <p>BLE provides considerably reduced power consumption (A)</p> Signup and view all the answers

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