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?
- A. 1 and 2 only
- B. 2 and 3 only
- C. 1 and 3 only
- D. 1, 2 and 3
Answer: D
Explanation
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. The definition ‘Short Range Device’ may be applied to many different types of wireless equipment, including various forms of: Access control (including door and gate openers) Alarms and movement detectors Closed-circuit television (CCTV) Cordless audio devices, including wireless microphones Industrial control Local Area Networks Medical implants Metering devices Remote control Radio frequency identification (RFID) Hence option (d) is the correct answer.