Which technology is commonly used for short-range data exchange between devices?

The technology commonly used for short-range data exchange between devices is 802.15.1, which is better known as Bluetooth. This technology enables wireless communication between devices over short distances, typically within a range of about 10 to 100 meters, depending on the specific version of Bluetooth used. It is widely adopted for connecting various devices such as smartphones, headphones, and smartwatches, allowing them to communicate and share data seamlessly.

Bluetooth operates in the 2.4 GHz frequency range and is designed specifically for low-power consumption, making it ideal for battery-operated devices. Its ability to create personal area networks (PANs) is what distinguishes it as a suitable technology for short-range data exchange tasks.

Other options like WiMAX, which is aimed at longer-range wireless broadband access, and RFID, used primarily for identification and tracking purposes rather than general data exchange, do not typically fit the description of short-range data exchange technologies as effectively. Wireless Gateways serve as communication hubs but are not a data exchange technology on their own, thus making 802.15.1 the most relevant choice for this context.