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34
Setting the Communication Domain
Stationary Wireless PCs
The Basic Service Set (BSS) is the communication 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 you want to connect to. Check with
your administrator for the SSID of the access point you should
connect to.
Roaming Wireless PCs
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. All wireless adapters and access points within
a specific ESS must be configured with the same SS ID and to the
same radio channel.
File
Server
Switch
Desktop PC
Access Point
Notebooks with Wireless
PC Card Adapters
Seamless Roaming
<BSS2>
<ESS>
<BSS1>
PC with Wireless
PC I Adapter
PC with Wireless
PCI Adapter
Notebook with Wireless
PC Card Adapter
Access Point
Wireless Cell
Coverage Area