JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech III FUNDAMENTALS OF INTERNET OF THINGS Previous Question Paper (August - 2022 - R18)

The implementation and scaling of IoT systems face several significant challenges:

• Security and Privacy: IoT devices often lack robust encryption and authentication mechanisms, making them vulnerable to cyberattacks, data breaches, and unauthorized access to sensitive user information.
• Interoperability and Standardization: The lack of universal standards leads to fragmented ecosystems where devices from different manufacturers cannot communicate effectively, hindering seamless integration.
• Scalability: Managing billions of interconnected devices requires highly scalable network architectures and cloud infrastructures capable of handling massive data streams without latency.
• Power Consumption: Many IoT devices are battery-operated and deployed in remote locations, necessitating energy-efficient hardware and communication protocols to extend operational life.
• Data Management and Analytics: The sheer volume, velocity, and variety of data generated by IoT devices create challenges in storage, real-time processing, and extracting actionable insights.
• Reliability and Connectivity: Maintaining consistent network connectivity in diverse environments is critical for mission-critical applications, as signal interference or network outages can lead to system failures.

IoT objects communicate a wide variety of information depending on their application, which can be broadly categorized into the following types:

• Sensor Data: This includes physical parameters such as temperature, humidity, pressure, light intensity, vibration, and air quality, typically captured by environmental or industrial sensors.
• Operational Status: Devices communicate their current state, such as battery levels, power consumption, CPU usage, connectivity status (e.g., signal strength), and error codes for diagnostic purposes.
• Location and Tracking Data: GPS coordinates, proximity information, or RFID/NFC tag identifiers are communicated to track the movement and positioning of assets or individuals.
• User Interaction Data: Input from human-machine interfaces, such as button presses, voice commands, or touch inputs, which trigger specific actions or configurations within the IoT system.
• Control and Configuration Commands: Objects receive and acknowledge instructions to perform specific tasks, such as switching a relay, adjusting a thermostat setpoint, or updating firmware.
• Identity and Metadata: Unique device identifiers (UIDs), manufacturer details, and timestamps are transmitted to ensure data provenance and facilitate device management within the network.