Question 58

Bluetooth is specifically designed for distances up to 30 feet.

Bluetooth technology is optimized for short-range communication, typically within a distance of about 30 feet, making it suitable for connecting devices like headphones, speakers, and smartphones.

A) Wide area network (WAN)

Wide area networks (WANs) are designed for long-distance communication, often spanning cities, countries, or even continents. They are not suitable for short-range data transmission like the question specifies, as they typically cover much greater distances than 30 feet.

B) Wi-Fi

Wi-Fi technology allows for wireless networking over medium to long distances, typically ranging from a few hundred feet to several thousand feet, depending on the router and environment. Thus, Wi-Fi is not limited to the 30 feet range and is not the best choice for this specific requirement.

C) Bluetooth

Bluetooth is ideal for short-range connections, with a maximum operational range of approximately 30 feet. This makes it the correct method for transmitting data specifically designed for short distances, aligning perfectly with the question's stipulation.

D) Near field communication (NFC)

Near field communication (NFC) is designed for extremely short-range communication, typically requiring devices to be within a few centimeters of each other. While it operates at shorter distances than Bluetooth, it does not meet the 30 feet criterion specified in the question.

Conclusion

Bluetooth is the only method listed that is explicitly designed for data transmission up to 30 feet, making it the correct choice. Other options, such as WAN, Wi-Fi, and NFC, either exceed the distance requirement or fall short, confirming that Bluetooth is the most suitable answer for this question.