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Appendix B: About Wireless LANs
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Appendix B: About
Wireless LANs
BSS /ESS
BSS
A group of Wireless Stations and a single Access Point, all using the same ID (SSID), form a Basic
Service Set (BSS).
Using the same SSID is essential. Devices with different SSIDs are unable to communicate with each
other.
ESS
A group of Wireless Stations, and
multiple Access Points, all using the
same ID (ESSID), form an Extended
Service Set (ESS).
Different Access Points within an ESS
can use different Channels. In fact, to
reduce interference, it is
recommended that adjacent Access
Points SHOULD use different channels.
As Wireless Stations are physically
moved through the area covered by an
ESS, they will automatically change to
the Access Point which has the least