WLAN WIFI 无线网络相关术语¶
hostapd的默认配置文件里有大量说明： https://w1.fi/cgit/hostap/plain/hostapd/hostapd.conf
IEEE标准：
802.11a (5 GHz)
802.11b (2.4 GHz)
802.11g (2.4 GHz)
802.11p (5.9 GHz)
802.11ax (6 GHz)
802.11ad/ay (60 GHz)
WIFI的商品名¶
Wi-Fi 5 -> 802.11ac Wi-Fi 6 -> 802.11ax
802.11n (HT)¶
Higher Throughput (HT) rates.
- Reducing the per-packet overhead in the MAC layer.
- Allowing multiple MAC packets to be combined into a single PHY-layer burst.
- Allowing (optionally) a more efficient LDPC encoder.
- Allowing (optionally) a shorter guard interval (cyclic prefix) on the data symbols.
- Increasing the number of subcarriers used in the default 20 MHz physical channel.
- Providing an (optional) 40 MHz mode.
- Using MIMO techniques to broadcast multiple data streams over a single frequency channel.
By combining these techniques, the goal is to increase the usable data transfer rate by a factor of 10.