An access point bridge connects two isolated computer networks using a device called an “access point” in bridge mode. It extends the range of a wireless signal and is effective for connecting two existing networks wirelessly. Some access points can form only one wireless bridge, while others can connect to several additional access points simultaneously. Switching an access point from root to bridge mode can be done via physical switch or software.
An access point bridge is a type of wireless connection that connects two isolated computer networks. This variety of connection uses a device called an “access point” that has been switched to “bridge” mode. As the name suggests, bridge mode joins two separate sets of connections and extends the range of a wireless signal. An access point bridge is not a single piece of hardware, but a type of connection formed between two separate access points.
Most wireless bridges depend on an access point device to function. An access point unit has both an antenna and a wired connection. A network cable provides the Internet signal to your device from a service provider, such as your cable company. In standard or “root” mode, an access point’s antenna wirelessly broadcasts the Internet signal to nearby users, who connect using laptops or handheld devices. This “root” mode is the most common configuration for an access point.
However, some access points can be switched from root to bridge mode. In this configuration, the access point device does not distribute the Internet signal to multiple end users, but to another access point on the same radio frequency. In other words, two access points form a “bridge” and communicate only with each other. Because the two access points are independently powered and have large antennas, a bridged connection with access points can typically cover a distance beyond the normal range of a standard wireless network.
The extended range capability of an access point bridge makes it effective for connecting two existing networks. If a company has two neighboring buildings, for example, a bridge can connect both locations and allow workers to share files and Internet connections. The wireless nature of this type of network eliminates the need to physically run cables between separate locations.
Some access point devices are capable of forming only one wireless bridge at a time. These are called “point-to-point” bridges. More advanced point-to-multipoint units can connect to several additional access points simultaneously, effectively creating multiple simultaneous wireless bridges. By using multiple access point bridges, large facilities such as college campuses can extend their wireless Internet coverage to a large number of buildings.
There are several methods for switching an access point from root to bridge mode. Some devices have a physical switch that can be easily activated, while others need to be reconfigured via software. Several manufacturers also produce dedicated bridge units, which are preset to operate in a “bridge” format without needing to be configured.
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