Zigbee protocol is the Connectivity Standards Alliance (formerly known as Zigbee Alliance) defined a full-stack solution for wireless personal area networks (WPAN). The Zigbee stack architecture is made up of a set of blocks called layers. Each layer performs a specific set of services for the layer above. The FuzzBox Zigbee APS Test Suite is a Defensics test suite designed for testing Application Support Sublayer (APS) of the Zigbee protocol stack.