Just Answer Correct Option  . QUESTION 21 Select the correct...

Just Answer Correct Option

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QUESTION 21 Select the correct statement(s) regarding IEEE 802.15 core and adopted protocols. O a. both core and adopted protocols must be used in its entirety in an WPAN application O b. adopted protocols are used to physically connect various BT devices, while core protocols operate exclusively at the upper application layers O c. parts of the core specifications are optional to better enable device customization O d. all statements are correct QUESTION 22 Which 802.15 sublayer protocol establishes centralized control and time division duplexing? O a. Baseband O b. LMP O c. Radio O d. all designated core protocols working together QUESTION 23 A host controller interface (HCI) acts as the direct radio layer interface between communications devices and the centralized controller. O True O False QUESTION 24 ZigBee is an IEEE 802.15 standard that operates on the ISM frequencies, and is a centrally controlled WPAN using FHSS and TDD similar to BT. The only difference between ZigBee and BT is the bit rates and wake-up times. O True O False

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