Final answer:
The technology used for digital data transmission in cell phone networks is 4G, which provides improvements in speed and data capacity over previous generations. Wi-Fi, NFC, and Bluetooth operate at different frequencies and are designed for various wireless communication needs.
Step-by-step explanation:
The type of technology used to provide digital data transmissions over cell phone networks is 4G. 4G stands for the fourth generation of cellular wireless standards and is a successor to the 3G and 2G families of standards. In evolving from earlier technologies, 4G has improved capabilities to accommodate the increasing demand for data transmission and speed. It operates in the radio-wave portion of the electromagnetic spectrum, typically at frequencies around 880 MHz. Digital data, like cell phone conversations and television voice and video images, is transmitted in binary form as a sequence of ones and zeros, which enhances clarity, especially when signals are weak, and allows more efficient compression and transmission of data.
Different technologies like Wi-Fi, NFC (Near Field Communication), and Bluetooth, all play a role in wireless communications but operate at varying frequencies and are designed for different kinds of interactions and ranges. Wi-Fi facilitates local area network connectivity, typically using 2.4 to 5 GHz frequencies. NFC is used for close-proximity tasks, such as contactless payments, and operates at 13.56 MHz. Bluetooth, operating in the 2.4-GHz range, is intended for short-range communication between devices, like linking headphones to a smartphone.