Question 48

Bluetooth is specifically designed for distances up to 30 feet.

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

A) Wi-Fi

Wi-Fi is designed for longer-range wireless communication, often exceeding 100 feet indoors and much more outdoors. Its primary function is to provide high-speed internet access over larger areas, which does not align with the short-distance specification of the question.

B) Wide area network (WAN)

A wide area network (WAN) covers a broad geographical area, often connecting multiple local area networks (LANs) across cities or countries. This method is not suitable for short distances, as it is intended for long-range data transmission.

C) Bluetooth

Bluetooth is specifically designed for short-range communication, typically effective up to 30 feet. This makes it ideal for connecting devices in close proximity, which directly answers the question regarding data transmission over short distances.

D) Near field communication (NFC)

Near field communication (NFC) operates over even shorter distances than Bluetooth, typically requiring devices to be within a few centimeters of each other. While NFC is excellent for very short-range transactions, it does not meet the 30-foot specification mentioned in the question.

Conclusion

Bluetooth is the only option that effectively meets the requirement for data transmission over distances up to 30 feet, making it the correct choice. Other options like Wi-Fi and WAN are designed for longer ranges, while NFC operates at much shorter distances, confirming that they do not satisfy the criteria set forth in the question.