Which is the future application of IoT?

• A. Multimedia communication
• B. QoS in communication
• C. Secure communication
• D. Role of green IoT system

Answer: (D)

The main idea being tested is how IoT will evolve toward being more sustainable and energy-efficient in real-world deployments. Green IoT focuses on reducing energy consumption, extending device lifetimes, and minimizing environmental impact through strategies like sleep modes, energy harvesting, efficient communication protocols, and edge processing that reduces data transmission. As the number of IoT devices grows, the cumulative energy use and waste become significant concerns, making sustainability a central driver for future designs. While multimedia communication, QoS, and secure communication are important today and will continue to be important, they are aspects within current operations. The broader, forward-looking direction is about building IoT systems that are environmentally friendly and energy-conscious, which is captured by the role of green IoT.