Which statement best describes M2M in IoT?

• A. Machines talk to humans more efficiently
• B. Machines can communicate with each other without human involvement, enabling automated decisions
• C. Machines require constant human oversight
• D. Machines only process data locally without network connectivity

Answer: (B)

M2M in IoT is about devices talking to each other directly, without human input, to automate decisions and actions. This automatic, device-to-device communication lets sensors, actuators, and controllers coordinate in real time—like a sensor detecting a condition and triggering a robotic arm or valve without a human in the loop. That automation is what makes M2M powerful: it increases speed, reliability, and efficiency by removing the need for constant human oversight.

The other statements don’t fit this idea. Machines talking to humans describes human–machine interactions, not machine–to–machine. Requiring constant human oversight contradicts the automation focus of M2M. Processing data locally without network connectivity would isolate devices and prevent the inter-device communication that M2M relies on.