Which topology is NOT natively supported by basic IEEE 802.15.4 MAC layer standard alone?
IEEE 802.15.4 MAC natively supports Star and Peer-to-Peer topologies. A cloud data center ring is an enterprise IP infrastructure, not an 802.15.4 MAC topology.
What is the maximum payload size of a single IEEE 802.15.4 physical layer frame?
The Maximum Physical Layer Packet Size (MPDU) in IEEE 802.15.4 is 127 bytes, which requires header compression techniques like 6LoWPAN.
What is the maximum size of the MAC frame (PSDU) supported by IEEE 802.15.4?
IEEE 802.15.4 supports a maximum MAC frame (PSDU) size of 127 bytes.
In MQTT, what is a 'Last Will and Testament' (LWT) message?
In MQTT, LWT is a message specified by the client during connection that the broker publishes if the client unexpectedly drops its TCP connection.
Which layer of the Zigbee protocol stack contains the Application Support Sublayer (APS) and Zigbee Device Objects (ZDO)?
The Zigbee APS sublayer and Zigbee Device Objects (ZDO) are part of the application layer, above the Zigbee Network (NWK) layer.