Table 8 Wi-Fi protocol comparison
From: Building an indoor air quality monitoring system based on the architecture of the Internet of Things
Protocol | Number of generation | Frequency band (GHz) | Bandwidth (MHz) | Maximum rate |
|---|---|---|---|---|
802.11 | The first generation | 2.4 | 20 | 2Â M bit/s |
802.11b | The second generation | 2.4 | 20 | 11Â M bit/s |
802.11Â g | The third generation | 2.4 | 20 | 54Â M bit/s |
802.11a | Â | 5 | Â | 54Â M bit/s |
802.11n | The fourth generation | 2.4 | 20 | 72Â M bit/s |
| Â | Â | 5 | 40 | 150Â M bit/s |
802.11ac | The fifth generation | 5 | 20 | 87Â M bit/s |
| Â | Â | Â | 40 | 200Â M bit/s |
| Â | Â | Â | 80 | 433Â M bit/s |
| Â | Â | Â | 160 | 866 |
802.11ax | The sixth generation | 2.4 | 160 | 1000Â M bit/s |
| Â | Â | 5 | Â | Â |
| Â | Â | 6[1] | Â | Â |