Wireless Communication Protocols:-

1. Infrared [IrDA]

2. Bluetooth

3. Zigbee

4. Wi-Fi

Features of Zigbee:-

1. Support for multiple network topologies such as point to point, point to multipoint and mesh networks, cluster tree.

2. ZigBee operates in the industrial, scientific and medical (ISM) radio bands: 2.4 GHz in most jurisdictions worldwide.

3. Low duty cycle provides long battery life.

4. 250 Kbps data rate.

5. Scalable and easy deployment.

6. Highly reliable and secure.

7. Low latency.

8. Cost effective.

9. Up to 65000 nodes per network.

10. 128 bit AES encryption for secure data connections.

11. Collision avoidance, retries and acknowledgments.