Which network protocol allows devices to communicate with each other over a short range, usually less than 30 feet/9 meters?

A) RFID
B) NFC
C) Bluetooth
D) IrDA

Bluetooth is a network protocol that allows devices to communicate with each other over a short range, usually less than 30 feet/9 meters. RFID is a protocol for tracking and identifying objects using radio waves, NFC is a protocol for wireless data transfer over short distances, and IrDA is an older infrared-based protocol for wireless data transfer. However, Bluetooth is the best choice for communication over short ranges as it is commonly supported by most modern devices and is designed to handle a variety of data types, including audio and video streaming.