IEEE defines WiFi. Each amendment adds capabilities while maintaining backward compatibility.
Major versions:
- n (WiFi ): MIMO, dual band, Mbps
- ac (WiFi ): GHz, MU-MIMO, Gbps
- ax (WiFi ): OFDMA, better density
- be (WiFi ): MHz channels, Gbps
What it defines:
- Frame formats and addressing
- Channel access mechanisms
- Security protocols (WPA)
WiFi Alliance certifies devices for interoperability.