6-6
Single BSS
The coverage of an AP is called a Basic Service Set (BSS). Each
BSS is identified by a BSSID. The most basic WLAN network can be
established with only one BSS. All wireless clients associate with
same BSS. If those clients have the same authorization, they can
communicate with each other. Figure 6-1 shows a single BSS
network.
Figure 6-1
Single BSS network
The clients can communicate with each other or reach a host in the
Internet. Communication between clients within the same BSS is
carried out through the Fat AP.
Muti-ESS
This topology describes a scenario where more than one ESS exists.
When a mobile client joins the Fat AP, it can join one of the available
ESSs. Figure 6-2 shows the multi-ESS network.
