ZyXEL nbg-334w Guia Do Utilizador

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Appendix E Wireless LANs
NBG334W User’s Guide
248
Figure 158   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.