ibps-so 2016 · Question 39 of 394

Chandrabhaga Urban Bank has installed at four hundred of its ATMs a small wireless unit which, of its own motion and at xed intervals, reports to a central server the level of cash remaining in each cassette, the temperature within the cabinet and the state of the shutter. The reports are neither raised nor read by any person at the moment they are sent; the server receives them, and the cash-management system raises a replenishment indent automatically when a cassette falls below its threshold. No human being intervenes anywhere between the sensor in the machine and the indent in the system. Communication of that description, in which two devices exchange data over a wireless link without any human intervention, is called:

1. APeer-to-peer le sharing
2. BClient–server computing
3. CElectronic data interchange between trading partners
4. DMachine-to-machine (M2M) communicationCorrect
5. ETime-division multiplexing of the wireless channel