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Appendix B Wireless LANs

with each other. When Intra-BSS is disabled, wireless client A and B can still access the wired network but cannot communicate with each other.

Figure 225 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.

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