Which of the following IEEE standards provides the lowest level of the ZigBee software stack? May 10, 2021 by admin Question: Which of the following IEEE standards provides the lowest level of the ZigBee software stack? A. IEEE 802.11. B. IEEE 802.15.1. C. IEEE 802.15.3. D. IEEE 802.15.4. Answer» d. IEEE 802.15.4. Note: The above multiple-choice question is for all general and Competitive Exams in India.