Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Comparison of different kinds of communication protocol.
| Protocol | Zigbee | Bluetooth | WiFi | WiMax | Cellular network |
|---|---|---|---|---|---|
| Range | 100 m | 10 m | 5 km | 15 km | 10–50 km |
| Data rate | 250–500 kbps | 1–3 Mbps | 1–450 Mbps | 75 Mbps | 240 kbps |
| Band-width | 2.4 GHz | 2.4 GHz | 2.4, 3.7, and 5 GHz | 2.3, 2.5, and 3.5 GHz | 824–894 MHz/1,900 MHz |
| Energy consumption | Low | Medium | High | N/A | N/A |
