ZigBee is a wireless communication technology that is designed for low-power, low-data-rate, and short-range wireless applications. It operates on the IEEE 802.15.4 standard and is widely used in the Internet of Things (IoT) devices.

The ZigBee architecture is composed of three main layers: the Application Layer, Network Layer, and Physical Layer.

Application Layer: This layer is responsible for managing the data that is exchanged between different devices. It defines the format and content of messages exchanged between different devices, and also specifies the rules for their transmission and receipt.

Network Layer: This layer manages the network topology and routing of data packets. It defines the structure of the network and ensures that data packets are delivered to their intended destinations in a timely and efficient manner.

Physical Layer: This layer is responsible for the transmission and reception of data packets over the wireless network. It defines the specifications for the physical medium used to transmit data, including the frequency, modulation, and encoding schemes.

ZigBee networks can be deployed in a variety of different configurations, including star, mesh, and cluster tree topologies. Each topology has its own advantages and disadvantages, and the choice of topology depends on the specific application requirements.

Overall, ZigBee technology is a popular choice for low-power, low-data-rate wireless applications due to its low power consumption, ease of deployment, and scalability. Its architecture is designed to support a wide range of different applications, making it a versatile and flexible wireless communication technology.