LG LW1100N User Manual page 8

Wireless lan pc card
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point connected to the wired network infrastructure and a set of wireless end
stations. This configuration is called a Basic Service Set (BSS). An Extended
Service Set (ESS) is a set of two or more BSSs forming a single sub-network.
Since most corporate WLANs require access to the wired LAN for services
(file servers, printers, Inter-net links) they will operate in infrastructure mode.
¦ Roaming
Wireless communication is limited by how far signals carry for given power output.
WLANs use cells, called microcells, similar to the cellular tel e phone system to extend
the range of wireless connectivity. At any point in time, a mobile PC equipped with a
WLAN adapter is associated with a single access point and its microcell, or area of
coverage. Individual microcells overlap to allow continuous communication within wired
network. They handle low power signals and "hand off" users as they roam through a
given geographic area.
The 802.11 MAC layer is responsible for how a client associates with an access point.
Distribution System (DS)
Ethernet (802.3)
Access Point (AP)
Service Set (SS) – Multiple
Figure 2. Infrastructure Mode
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