Versions-History von IEEE 802.11

Zum Begriff IEEE 802.11

Änderung des Felds Beschreibung am Donnerstag, 26. Juli 2001, 0:00:
+802.11 refers to a family of specifications developed by the <a href="./?w=1&q=1153">IEEE</a> for wireless <a href="./?w=1&q=352">LAN</a> technology. 802.11 specifies an over-the-air interface between a wireless client and a base station or between two wireless clients. The <a href="./?w=1&q=1153">IEEE</a> accepted the specification in 1997. <br> <br>There are several specifications in the 802.11 family: <br> <br>802.11 -- applies to wireless <a href="./?w=1&q=352">LANs</a> and provides 1 or 2 Mbps transmission in the 2.4 GHz band using either frequency hopping spread spectrum (FHSS) or direct sequence spread spectrum (DSSS). <br>802.11a -- an extension to 802.11 that applies to wireless <a href="./?w=1&q=352">LANs</a> and provides up to 54 Mbps in the 5GHz band. 802.11a uses an orthogonal frequency division multiplexing encoding scheme rather than FHSS or DSSS. <br>802.11b (also referred to as 802.11 High Rate or Wi-Fi) -- an extension to 802.11 that applies to wireless LANS and provides 11 Mbps transmission (with a fallback to 5.5, 2 and 1 Mbps) in the 2.4 GHz band. 802.11b uses only DSSS. 802.11b was a 1999 ratification to the original 802.11 standard, allowing wireless functionality comparable to <a href="./?w=1&q=235">Ethernet</a>. <br>802.11g -- applies to wireless <a href="./?w=1&q=352">LANs</a> and provides 20+ Mbps in the 2.4 GHz band. <br>(c) http://www.webopedia.com/TERM/8/802_11.html

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