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Sabtu, 1 Mei 2010

802.11a hingga 802.11z mengikut abjad

Kebanyakkan Juruteknik Komputer tahu tentang 802.11a/b/g/n tetapi tidak tahu 802.11a sampai z, dan mungkin juruteknik komputer tidak terpikir 802.11a hingga 802.11z

802.11: The original 1 Mbit/s & 2 Mbit/s, 2.4 GHz RF & IR standard with 20MHz-wide channels
802.11a: 5GHz channels with 54/48/36/24/18/12/9/6 Mbps data rates
802.11b: added 5.5 and 11Mbps data rates to the original 802.11 spec
802.11c: adopted STP(802.1D) for wireless
802.11d: defined new regulatory domains
802.11e: Quality-of-Service for wireless
802.11f: inter access point protocol (rescinded; suggested practice only)
802.11g: added 54/48/26/24/18/12/9/6 Mbps data rates to 2.4GHz channels
802.11h: dynamic frequency selection and transmit power control for 5GHz (to avoid interfering with radar).
802.11i: Security enhancement to AES encryption, TKIP ciphers and 802.1x authentication
802.11j: 4.9 GHz – 5GHz Operation in alternate regulatory domain (Japan)
802.11k: Radio Resource Measurement enhancements
802.11l: (not used,could be confused with 802.11i)
802.11ma: maintenance changes to 802.11a, 802.11b, 802.11b corrigendum 1, and 802.11d.
802.11n: Higher Throughput up to 624 Mbps using 40Mhz wide channels and MIMO antennas
802.11o: Not used. typologically unsound
802.11p: WAVE – Wireless Access for the Vehicular Environment (such as ambulances and passenger cars, rail and marine.)- Communication to and between vehicles operating at speeds up to a minimum of 200 km/h for up to 1000 meters in the 5.850-5.925 GHz (US) and 5GHz (non-US) bands
802.11q: (not used, typologically unsound, can be confused with 802.1Q VLAN trunking)
802.11r: Fast connectivity for VoIP in ESS (aka Fast roaming across APs for VoIP devices)
802.11s: Wireless Mesh for 802.11 systems including wireless path provisioning
802.11T: Wireless Performance Prediction (WPP) – test methods and metrics. This is a “recommended practice” and not a standard.
802.11u: Interworking with non-802 networks (e.g., cellular)
802.11v: Wireless network management of wireless client stations
802.11w: Protected Management Frames
802.11x: Reserved
802.11y: Contention Based Protocol for 3650-3700 MHz band in the USA.
802.11z: Reserved