Consider the following communication technologies :
- 1.Closed-circuit Television
- 2.Radio Frequency Identification
- 3.Wireless Local Area Network
Which of the above are considered Short-Range devices/ technologies ?
- A.1 and 2 only
- B.2 and 3 only
- C.1 and 3 only
- D.1, 2 and 3
▶ Answer & Explanation
Correct answer: D. 1, 2 and 3
Closed-circuit television (CCTV) systems typically operate over short distances using wired or wireless connections within a confined area. Radio Frequency Identification (RFID) tags and readers communicate over very short ranges, often only a few meters. Wireless Local Area Networks (WLANs), like Wi-Fi, are designed for short-to-medium range communication within a building or campus. All three technologies are generally characterized by their limited operational radius.
Source: UPSC gs1 2022