Madge Networks 802.11b Uživatelský manuál stáhnout pdf (Strana 23)

IEEE 802.11 Wireless LAN

• 802.11b

– 2.4-5 GHz unlicensed

radio spectrum

– up to 11 Mbps

– direct sequence

spread spectrum

(DSSS) in physical

layer

• all hosts use same

chipping code

– widely deployed, using

base stations

• 802.11a

– 5-6 GHz range

– up to 54 Mbps

• 802.11g

– 2.4-5 GHz range

– up to 54 Mbps

• All use CSMA/CA

for multiple access

• All have base-

station and ad-hoc

network versions

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