Which of the following communication technologies are considered as short-range devices or technologies?

1.CCTV

2.RFID

3.WLAN

A1 & 2 only

B1 & 3 only

C2 & 3 only

D1, 2 & 3 ✓ Correct

Correct answer: (D) 1, 2 & 3

Explanation

CCTV, RFID and WLAN all operate over short distances rather than long-haul links.

Statement 1 CCTV cameras feed nearby monitors over limited local cabling or signals.

Statement 2 RFID tags are read by scanners only a few centimetres to metres away.

Statement 3 WLAN covers a home or office within roughly a hundred metres.

Short-range technologies trade reach for low power and simple local coverage.

Bluetooth and NFC are further familiar short-range examples.

Want more like this? Create a free account to practise a full test, track your progress, and get spaced-repetition review.