Which topic is highlighted as a key future focus for IoT, focusing on sustainability?

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

Answer: (A)

Reducing energy use and environmental impact in IoT deployments is the focal idea here. Green IoT systems aim to minimize power consumption, extend device lifetimes, and design for sustainable lifecycle practices, using energy-efficient hardware, sleep modes, duty cycling, and even energy harvesting where possible. This focus becomes increasingly important as the number of connected devices grows, making sustainability a central concern for the future of IoT.

Among the options, the emphasis on a green IoT system directly targets that sustainability goal. The other topics—quality of service centers on reliable and timely data delivery, secure communication focuses on protecting data and devices, and multimedia communication deals with handling richer data types and bandwidth—while important, do not specifically address reducing energy use and environmental impact.