Which technology enables devices to communicate over short distances without wires?

Which technology enables devices to communicate over short distances without wires?

• A. Bluetooth
• B. Ethernet
• C. NFC
• D. Wi-Fi

Answer: (C)

The technology that enables devices to communicate over short distances without wires is NFC, or Near Field Communication. NFC allows two devices to exchange data when they are very close to each other, typically within a range of about 4 centimeters. This makes it ideal for applications such as mobile payments, access control, and pairing devices effortlessly. While Bluetooth also facilitates short-range communication, it has a longer operational range, typically up to 10 meters, allowing for connections between devices further apart than NFC. Ethernet involves wired connections and is not wireless at all, which is contrary to the question's focus on wireless communication. Wi-Fi, on the other hand, allows for wireless communication over longer distances, typically throughout an entire home or office, making it unsuitable for scenarios that require very short-range connectivity like NFC. This is why NFC is the most accurate answer in the context of short-distance wireless communication.

The technology that enables devices to communicate over short distances without wires is NFC, or Near Field Communication. NFC allows two devices to exchange data when they are very close to each other, typically within a range of about 4 centimeters. This makes it ideal for applications such as mobile payments, access control, and pairing devices effortlessly.

While Bluetooth also facilitates short-range communication, it has a longer operational range, typically up to 10 meters, allowing for connections between devices further apart than NFC. Ethernet involves wired connections and is not wireless at all, which is contrary to the question's focus on wireless communication. Wi-Fi, on the other hand, allows for wireless communication over longer distances, typically throughout an entire home or office, making it unsuitable for scenarios that require very short-range connectivity like NFC. This is why NFC is the most accurate answer in the context of short-distance wireless communication.