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Personal Area Network; a collection of cooperating devices which are associated and share the same address space.
The 16-bit value which is used to uniquely define a PAN. Devices make the decision on what radio networks to join based on their PAN ID.
The ZigBee device which is responsible for starting the formation of a ZigBee network. The ZigBee PAN coordinator chooses the PAN ID. There is only one ZigBee PAN Coordinator in any ZigBee network; it’s ZigBee address is always 0.
A device which can route ZigBee packets as part of it’s normal operation; also called a ZigBee “Router”. FFDs form the meshed network topology by establishing communications links to other devices (both FFDs and RFDs). FFDs can act as a sensor or actuator or other type of node.
An RFD is a device which cannot route ZigBee packets. They are always associated with a single FFD and can only participate in the network as an end, or leaf, node.
A network with multiple possible routes between nodes over which a packet can be routed. FFDs form the mesh and discover routes between nodes using a variety of routing algorithms (tree routing or AODV for example).