ZyXEL Communications MWR222 - V1.0 Manual page 262

Intra-BSS traffic is traffic between wireless stations in the BSS. When Intra-BSS
is enabled, wireless station A and B can access the wired network and
communicate with each other. When Intra-BSS is disabled, wireless station A and
B can still access the wired network but cannot communicate with each other.
Figure 171 Basic Service Set
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).
This type of wireless LAN topology is called an Infrastructure WLAN. The Access
Points not only provide communication with the wired network but also mediate
wireless network traffic in the immediate neighborhood.
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.
MWR222 User's Guide
262