# Wi-Fi # Comparatif des différents WIFI ##### Tableau :
**Norme** | **Wifi 1 (802.11a)** | **Wifi 2 (802.11b)** | **Wifi 3 (802.11g)** | **Wifi 4 (802.11n)** | **Wifi 5 (802.11ac)** | **Wifi 6 (802.11ax)** |
Fréquences | 5GHz | 2.4GHz | 2.4GHz | 2.4GHz et 5GHz | 5GHz | 2.4GHz et 5GHz |
Largeur de bande | 20 MHz | 20 MHz | 20 MHz | 20, 40MHz | 20, 40, 80MHz | 20, 40, 80, 160MHz |
Débit Max | 54 Mbps | 11 Mbps | 54 Mbps | 144/300 Mbps | 3.4 Gbps | 10.5 Gbps |
Nombre maximum de flux MIMO | 1 | 1 | 1 | 4 | 8 | 8 |
MU-MIMO | NON | NON | NON | NON | DOWN | UP + DOWN |
Codage / Modulation | OFDM | DSSS | OFDM | OFDM | OFDM | OFDM + OFDMA |
Débit / Ant. | 54Mbps | 11Mbps | 54Mbps | 72/150Mbps | 433Mbps | 143/1299Mbps |