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The infrastructure configuration not only extends the accessibility of wireless PCs to
the wired LAN, but also increases the effective wireless transmission range for
wireless PCs by passing their signal through one or more access points.
A wireless infrastructure can be used for access to a central database, or for connection
between mobile workers, as shown in the following figure.
INFRASTRUCTURE WIRELESS LAN FOR ROAMING WIRELESS
PC
S
The Basic Service Set (BSS) is the communications domain for each access point. For
wireless PCs that do not need to support roaming, set the domain identifier (SSID) for
the wireless card to the SSID of the access point to which you want to connect. A
wireless infrastructure can also support roaming for mobile workers. More than one
access point can be configured to create an Extended Service Set (ESS). By placing the
access points so that a continuous coverage area is created, wireless users within this
ESS can roam freely.
File
Server
Switch
Desktop PC
Access Point
Wired LAN Extension
to Wireless Adapters
PC with Wireless
PCIAdapter
Notebook with Wireless
PC CardAdapter