p2.802.11_overview

p2.802.11_overview - 902-928 MHz 2.4-2.5 GHz (FCC)...

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bxyics 1 bxyics 1 A Typical Wireless Home Network bxyics 2 A Corporate Wireless Network bxyics 3 802.11 ± Adopted in 1997 by IEEE ± Defines MAC and PHY for a LAN with wireless connectivity
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bxyics 2 bxyics 4 Independent Basic Service Set (IBSS) ± Ad hoc network ± Peer to peer network bxyics 5 Infrastructure Basic Service Set ± BSS with an access point ± Basic Service Set Identifier (BSSID) ± Distribution system ± Service Set Identifier (SSID/ESSID) bxyics 6 Extended Service Set (ESS)
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bxyics 3 bxyics 7 Access Points ± Basic Functions ± Three operation modes ± Other network functions bxyics 8 Stations or client devices ± Wireless NIC ± Provide interface between the Data Link layer and the physical layer ± Types bxyics 9 Beacons ± Sent every 10-100 ms ± Includes ± SSID (sometime not) ± Channel ± Time stamp (sync) ± Supported rates ± Encryption
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bxyics 4 bxyics 10 Bandwidth ± ISM (Industrial, Scientific and Medical bands)
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Unformatted text preview: 902-928 MHz 2.4-2.5 GHz (FCC) 2.4-2.4835 GHz (IEEE) 5.725-5.875 GHz UNII (Unlicensed National Information Infrastructure bands) Lower band: 5.15-5.25 GHz Middle band: 5.25-5.35 GHz Upper band: 5.725-5.825 GHz bxyics 11 Standards 300 feet 300 feet 225 feet 300 feet Range 19 Mbps 5 Mbps 19 Mbps 1.2 Mbps Effective throughput OFDM/ DSSS DSSS with CCK OFDM FHSS/ DSSS Modulation 54 Mbps 11 Mbps 54 Mbps 2 Mbps Max Data Rate 2.4 GHz 2.4 GHz 5 GHz 2.4 GHz Frequencies 802.11g 802.11b 802.11a 802.11 bxyics 12 Hedy Lamarr bxyics 5 bxyics 13 Frequency Hoping Spread Spectrum (FHSS) bxyics 14 FHSS Frequency band Hop sequence Dwell time Hop time Hop sequences sets bxyics 15 Hop Sequences Sets...
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p2.802.11_overview - 902-928 MHz 2.4-2.5 GHz (FCC)...

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