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new ccna cert.42 Chapter 4 Wireless LAN Technologies and Topologies1. workgroup bridgesIt may be common to encounter situations where an isolated network needs access to other networks to access server farms and the Internet, but cannot be connected to that isolated network with Ethernet cable, or where you cannot drill holes in the wall because you do not have home ownership. In this case, a WGB topology such as the one shown in Figure 4.6 can be used.Isolated Wired NetworkFigure 4-6 Workgroup Bridge TopologyNote that this WGB is used to bridge a wired network to an APO that is connected to a distributed system Cisco offers two types of workgroup bridges.Autonomous Workgroup Bridge (aWGB, AutonomousWorkgroupBridge): aWGB was originally known only as a WorkgroupBridge, but changed its name when Cisco introduced the Universal WGB. The aWGB is supported in IOSAP version 12.4(3G)JA and subsequent versions. aWGB connects only to the upstream CiscoAP, and the AP can discover multiple Ethernet clients.Universal Workgroup Bridge (uWGB, Universal Wbricgroup Bridge): uWGBs are supported in IOSAP version 12.4(11)XJ and later. uWGBs allow bridging to upstream non-CiscoAPs and appear as f-clients.2. RepeaterWhen explaining Extended Service Set (ESS,ExtendedServiceSet), multiple APs connect clients. This approach will not work well when some clients roam to areas that need coverage but do not have it. The WGB solution does not work here because the WGBs are connected to wired users. In many cases it is not possible to lead the cable to the designated