Many Wi-Fi bridging mode products exist with varying levels of functionality. Some wireless bridges support only a single point-to-point connection to another AP. Others support point-to-multipoint connections to several other APs.
Each AP in bridging mode connects to a wired LAN. Some AP models simultaneously support wireless clients while operating in bridging mode, but others work as "bridge-only" and disallow any clients from connecting.
Root AP - Places the bridge in the access point mode. In this mode, the bridge emulates a Cisco Aironet Access Point(example: 1100 Series ) and accepts associations from client devices.