Consider the following communication technologies:

1. Closed-circuit Television
2. Radio Frequency Identification
3. Wireless Local Area Network

Which of the above are considered communication Short-Range devices/technologies?

1. 1 and 2 only
2. 2 and 3 only
3. 1 and 3 only
4. 1, 2 and 3

Explanation

Option (d) is correct

• Closed-Circuit Television (CCTV) systems typically operate within a confined area such as a building or campus using wired or short-range wireless links, placing them in the short-range category. Radio Frequency Identification (RFID) is inherently a short-range technology, typically operating from a few centimetres to a few metres for object identification. Wireless Local Area Network (WLAN), commonly known as Wi-Fi, also operates over limited distances—tens of meters indoors and up to a few hundred meters outdoors—thus falling under short-range communication when compared to long-range technologies like cellular or satellite systems.

Answer: (d) 1, 2 and 3; Difficulty Level: Easy