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^A In the 2.4 GHz bands bonded 40 MHz channels are uniquely named by the primary and secondary 20 MHz channels, e.g. 9+13. In the 5 GHz bands they are denoted by the center of the wider band and the primary 20 MHz channel e.g. 42[40] ^B In the US, 802.11 operation on channels 12 and 13 is allowed under low power conditions.
802.11g is the third modulation standard for wireless LANs.It works in the 2.4 GHz band (like 802.11b) but operates at a maximum raw data rate of 54 Mbit/s.Using the CSMA/CA transmission scheme, 31.4 Mbit/s [6] is the maximum net throughput possible for packets of 1500 bytes in size and a 54 Mbit/s wireless rate (identical to 802.11a core, except for some additional legacy overhead for ...
Subsequently in 2016, Wi-Fi Alliance introduced the Wave 2 certification, which includes additional features like MU-MIMO (downlink only), 160 MHz channel width support, support for more 5 GHz channels, and four spatial streams (with four antennas; compared to three in Wave 1 and 802.11n, and eight in IEEE's 802.11ax specification). [14]
The 5 GHz band has substantial capacity due to many non-overlapping radio channels and less radio interference as compared to the 2.4 GHz band. [19] An 802.11n-only network may be impractical for many users because they need to support legacy equipment that still is 802.11b/g only.
(GHz) Wi-Fi 0 [a] — 802.11: 1997 1–2 2.4 Wi-Fi 1 [a] — 802.11b: 1999 1–11 2.4 Wi-Fi 2 [a] — 802.11a: 1999 6–54 5 Wi-Fi 3 [a] — 802.11g: 2003 2.4 Wi-Fi 4: 802.11n: 2009 6.5–600 2.4, 5 Wi-Fi 5: 802.11ac: 2013 6.5–6933 5 [b] Wi-Fi 6 [4] 802.11ax: 2021 0.4–9608 2.4, 5 Wi-Fi 6E: 2.4, 5, 6 [c] Wi-Fi 7 [5] 802.11be: 2024 [d] 0.4 ...
2.4, 5, 6 IEEE 802.11be , dubbed Extremely High Throughput (EHT) , is a wireless networking standard in the IEEE 802.11 set of protocols [ 6 ] [ 7 ] which is designated Wi-Fi 7 by the Wi-Fi Alliance .
Using cordless phones that do not use the 2.4 GHz band. Using the 5 GHz band. DECT 6.0 (1.9 GHz), 5.8 GHz or 900 MHz phones, commonly available today, do not use the 2.4 GHz band and thus do not interfere. VoIP/Wi-Fi phones share the Wi-Fi base stations and participate in the Wi-Fi contention protocols.
Long-range Wi-Fi especially in the 2.4 GHz band (as the shorter-range higher-bit-rate 5.8 GHz bands become popular alternatives to wired LAN connections) have proliferated with specialist devices. While Wi-Fi hotspots are ubiquitous in urban areas, some rural areas use more powerful longer-range transceivers as alternatives to cell ( GSM , CDMA ...