IronPort Systems ZyAIR B-4000 - Manual (Page 158)

ZyAIR B-4000 Spot Gateway
18-2 Wireless LAN
Figure 18-2 Basic Service set
18.1.3 ESS
An Extended Service Set (ESS) consists of a series of overlapping BSSs, each containing an access point,
with each access point connected together by a wired network. This wired connection between APs is
called a Distribution System (DS). An ESSID (ESS IDentification) uniquely identifies each ESS. All
access points and their associated wireless stations within the same ESS must have the same ESSID in
order to communicate.
Figure 18-3 Extended Service Set