UPSC Prelims 2022 · Question 36 of 98

UPSC Prelims 2022 question on Short Range Devices

Consider following communication the technologies:

1. Closed-circuit Television

2. Radio Frequency Identification

3. Wireless Local Area Network

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

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

Answer: D. 1, 2 and 3

Verdict

All three are considered Short Range devices/technologies → Option (d).

Analysis

Short Range Devices (SRD) are radio devices that offer a low risk of interference with other radio services, usually because their transmitted power, and hence their range, is low.

Statement by statement

Statement 1 – CORRECT: Closed-circuit television (CCTV) is included in the definition of Short Range Device applications — it uses low-power, short-range radio transmission.

Statement 2 – CORRECT: Radio Frequency Identification (RFID) is a short-range communication technology that uses radio waves to identify and track tags attached to objects.

Statement 3 – CORRECT: Local Area Networks (LAN/WLAN) are included in the Short Range Device category as they operate within a limited range using low-power signals.

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