The vision of a global network of interconnected computer networks, which would later give rise to IoT, was first proposed by ________.

  • Alan Turing
  • Bill Gates
  • J.C.R. Licklider
  • Nikola Tesla
The vision of a global network of interconnected computer networks, which laid the foundation for the Internet of Things (IoT), was first proposed by "J.C.R. Licklider." His ideas and contributions to the development of the ARPANET, a precursor to the internet, were instrumental in shaping the concept of IoT.

Which protocol is designed for scenarios where minimal code footprint is required and the network's bandwidth is limited?

  • CoAP
  • HTTP
  • MQTT
  • TCP
CoAP (Constrained Application Protocol) is designed specifically for IoT scenarios where resources like memory and bandwidth are limited. It's a lightweight and efficient protocol that is well-suited for IoT devices with constrained capabilities. Unlike HTTP and TCP, CoAP is tailored for these resource-constrained environments.

A major vulnerability in many IoT devices is:

  • Energy-efficient design
  • Frequent software updates
  • Inexpensive hardware
  • Weak or default passwords
A significant vulnerability in IoT devices is the use of weak or default passwords, which can be exploited by attackers to gain unauthorized access. It's essential to use strong, unique passwords to mitigate this risk.

An IoT startup wants to store data from wearable devices. This data will be structured, semi-structured, and unstructured. Which type of database should they consider?

  • Graph Database
  • NoSQL Database
  • Relational Database
  • SQL Database
IoT devices often generate diverse data types, including structured, semi-structured, and unstructured data. NoSQL databases are a suitable choice because they can handle various data types, provide flexibility, and scale horizontally to accommodate the growing data from wearable devices.

An organization implemented a system where an IoT device required both a password and a biometric scan to access. This is a form of:

  • Encryption
  • IoT Security
  • Multi-Access Control
  • Two-Factor Authentication
Requiring both a password and a biometric scan is a form of Two-Factor Authentication (2FA). It adds an extra layer of security beyond a simple password, making it harder for unauthorized users to gain access.

Advanced visualization tools in IoT are crucial for:

  • Reducing data storage costs.
  • Enhancing the aesthetics of IoT dashboards.
  • Gaining insights from complex data.
  • Managing IoT device firmware.
Advanced visualization tools in IoT are crucial for gaining insights from complex data. With the enormous volume of data generated by IoT devices, visualizations help in presenting the data in a comprehensible manner. This is vital for analyzing trends, anomalies, and making informed decisions in IoT applications.

How can blockchain technology enhance the security of IoT devices?

  • Data immutability
  • Decentralized control
  • Improved battery life
  • Real-time data analysis
Blockchain enhances IoT security through data immutability. Blockchain's distributed ledger ensures that once data is recorded, it cannot be altered, making it ideal for securing the integrity of IoT data, such as sensor readings and device logs.

Devices connected via ________ are known for their ability to connect directly without requiring a central hub or router.

  • Bluetooth
  • Thread
  • Wi-Fi
  • Zigbee
Devices connected via the Thread wireless protocol are known for their ability to create self-healing mesh networks and connect directly with one another. Thread allows devices to communicate in a decentralized manner, eliminating the need for a central hub or router.

After a series of unauthorized data breaches from its IoT devices, a company decided to implement a system where each device had to present a unique digital certificate to communicate. This approach emphasizes:

  • Data Encryption
  • Data Storage
  • Firewall Protection
  • Identity and Authentication
Requiring unique digital certificates for each device emphasizes Identity and Authentication. It ensures that each device is who it claims to be, adding a layer of security to prevent unauthorized access or data breaches.

Which protocol is designed for scenarios where minimal code footprint is required and the network's bandwidth is limited?

  • CoAP
  • HTTP
  • MQTT
  • REST
The Constrained Application Protocol (CoAP) is specifically designed for IoT scenarios where resources, code footprint, and bandwidth are limited. It's a lightweight protocol that enables efficient communication between IoT devices and applications. CoAP is designed for constrained networks and devices.