1. Key points

  • Wi-Fi CERTIFIED 7 adds 320 MHz channels in 6 GHz, Multi-Link Operation and 4K QAM.
  • Wi-Fi Alliance states 4K QAM gives about 20% higher transmission rates than 1024 QAM in Wi-Fi 6.
  • Devices are backward compatible and connect at the highest standard both sides support.
  • Higher frequencies carry more data but penetrate walls less.

2. Generations

Wi-Fi 6 improved efficiency in crowded networks; Wi-Fi 6E extended operation into 6 GHz; Wi-Fi 7 widens channels and adds multi-link operation.

3. Practical limits

Real-world speed depends on device support, distance, obstacles and the internet connection.