ZyXEL Communications XMG Series User Manual page 386

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Appendix B Wireless LANs

Figure 244 Basic Service Set

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

clients within the same ESS must have the same ESSID in order to communicate.

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