Q. Consider the following statements:
1.Zigbee is a high-power, high-data-rate protocol used primarily for streaming 4K video over long distances.
2.Infrared (IR) technology requires a direct line-of-sight and is commonly used in television remote controls.
3.Near Field Communication (NFC) is a long-range technology that facilitates data exchange between devices up to 10 meters apart.
Which of the statements given above is/are correct?
Answer: B
Notes:
Explanation:
- Statement 1 is incorrect: Zigbee is low-power and low-data-rate, ideal for simple sensor data and home automation.
- Statement 2 is correct: IR uses light pulses and generally requires the sender and receiver to be “visible” to each other.
- Statement 3 is incorrect: NFC is a very short-range technology, typically working within a few centimeters (e.g., tap-to-pay).
