George is a security professional working for iTech Solutions. He was tasked with securely transferring sensitive data of the organization between industrial systems. In this process, he used a…

Question

Options

• AMQTT
• BLPWAN
• CZigbee
• DNB-IoT

• A
  3% (1)
• B
  8% (3)
• C
  88% (35)
• D
  3% (1)

Explanation

Zigbee (Option C) is the correct answer because it is a short-range wireless communication protocol built specifically on the IEEE 802.15.4 standard, designed for low data rate, infrequent data transfer in a restricted area with a typical range of 10–100 meters - perfectly matching all the clues in the scenario.

Why the distractors are wrong:

• MQTT (A) is a lightweight messaging protocol (not a wireless communication technology) used for IoT data transmission over existing networks like TCP/IP.
• LPWAN (B) is a long-range, low-power network category (e.g., LoRa) designed for wide-area coverage spanning kilometers, not 10–100 m.
• NB-IoT (D) is a cellular-based IoT technology using licensed spectrum with much broader coverage, not a short-range protocol tied to IEEE 802.15.4.

Memory Tip: Think of Zigbee = "Zig" short paths - it zigs across short distances (10–100 m) in industrial/home automation settings, and the number 802.15.4 can be remembered as the "little" standard (15 is small), fitting Zigbee's low-power, low-data-rate nature. If you see IEEE 802.15.4 + short range + low data rate, always think Zigbee.

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