ZigBee is an IEEE 802.15.4-based specification for a suite of high-level communication protocols used to create PANs with small, low-power radios. Which statement is true?

• A. True
• B. False
• C. Partly true
• D. Not true

Answer: (A)

This statement is true because ZigBee sits on top of the IEEE 802.15.4 standard, which provides the physical and MAC layers for low-power wireless links. ZigBee adds its own high-level protocol stack—covering network, security, and application layers—so devices can form small, battery-efficient personal area networks (PANs) with features like low data rates, extended sleep times, and multi-hop mesh or star-topology communication. In short, 802.15.4 handles the low-power radio and basic access, while ZigBee defines the higher-level protocols that enable practical PANs with small devices. If someone claimed it’s not based on 802.15.4 or isn’t for low-power PANs, that would conflict with the established architecture.