Wireless Topologies Inc. Workgroup Bridges

Just a quick post to cement in my head the differences in wireless topologies The topologies are:
IBSS (Adhoc), BSS, ESS

IBSS (Independant Basic Service Set) is the adhoc method of wireless connections. WIFI clients communicate directly using their wireless adapters without the use of an access point.

BSS (Basic Service Set) is where wireless clients communicate through a single access point.
A confusing point here is the term Infrastructure Basic Service Set (not to be confused with Independent Basic Service Set). The addition of the word infrastructure implies a connection back to the network, known as the Distribution System (DS). It is common place to use these two terms in place of each other, BSS and Infrastructure BSS.

ESS (Extended Service Set) is essentially multiple access points providing the same SSID allowing clients to roam around the network without loosing the connection. The access points should have a 10 - 20% overlap.

Workgroup Bridges (WGB):
If a group of hosts need to connect to the wireless network but they do not have wireless access themselves a workgroup bridge is used. The bridge provides a wired connection for the host devices and a wireless connection back into the wireless network. The wired and wireless connections are bridged. There are two types of WGB in the Cisco world - universal (uWGB) and autonomous (aWGB).

A aWGB provides a single wireless connection for multiple wired clients and also appears as a non-standard client on the wireless network. Note this is a Cisco proprietary type of WGB.

uWGB is a non-proprietary version which can be used to connect to Cisco or non-Cisco APs. The bridge appears as a normal client to the AP. uWGB supports a single client only.