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com:basic_wifi [2024/11/16 18:34] – created vamsancom:basic_wifi [2024/11/16 18:46] (current) – vamsan
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 Wi-Fi's radio bands work best for line-of-sight use. Many common obstructions, such as walls, pillars, home appliances, etc., may greatly reduce range, but this also helps minimize interference between different networks in crowded environments. The range of an access point is about 20 m indoors, while some access points claim up to a 150 m range outdoors. Hotspot coverage can be as small as a single room with walls that block radio waves or as large as many square kilometers using many overlapping access points with roaming permitted between them. Over time, the speed and spectral efficiency of Wi-Fi have increased. As of 2019, some versions of Wi-Fi, running on suitable hardware at close range, can achieve speeds of 9.6 Gbit/s. Wi-Fi's radio bands work best for line-of-sight use. Many common obstructions, such as walls, pillars, home appliances, etc., may greatly reduce range, but this also helps minimize interference between different networks in crowded environments. The range of an access point is about 20 m indoors, while some access points claim up to a 150 m range outdoors. Hotspot coverage can be as small as a single room with walls that block radio waves or as large as many square kilometers using many overlapping access points with roaming permitted between them. Over time, the speed and spectral efficiency of Wi-Fi have increased. As of 2019, some versions of Wi-Fi, running on suitable hardware at close range, can achieve speeds of 9.6 Gbit/s.
 +
 +====== Versions and generations ======
 +|< 100%>|
 +^Generation^IEEE standard^Adopted^Maximum link rate (Mb/s)^Radio frequency (GHz)|
 +^(Wi-Fi 0*)|802.11|1997|1–2|2.4|
 +^(Wi-Fi 1*)|802.11b|1999|1–11|2.4|
 +^(Wi-Fi 2*)|802.11a|1999|6–54|5|
 +^(Wi-Fi 3*)|802.11g|2003|6–54|2.4|
 +^Wi-Fi 4|802.11n|2009|6.5–600|2.4, 5|
 +^Wi-Fi 5|802.11ac|2013|6.5–6933|5|
 +^Wi-Fi 6|802.11ax|2021|0.4–9608|2.4, 5|
 +^Wi-Fi 6E|802.11ax|2021|0.4–9608|2.4, 5, 6|
 +^Wi-Fi 7|802.11be|exp. 2024|0.4–23,059|2.4, 5, 6|
 +^Wi-Fi 8|802.11bn|exp. 2028[|100,000|2.4, 5, 6|
 +
 +===== Sources =====
 +Wikipedia ([[https://en.wikipedia.org/wiki/Wi-Fi|here]]) \\
 +
 +===== Wi-fi topics on lamaPLC =====
 +{{topic>Wi-fi}}
 +
 +\\
 +\\
 +{{tag>communication IoT internet Wi-Fi Wifi IEEE_802.11}}
 +\\
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