A bridge in networking operates at the data link layer (Layer 2) of the OSI model and is used to connect two or more separate networks or segments within a single network. It functions by inspecting incoming data packets, determining their destination addresses (MAC addresses), and selectively forwarding packets only to the segment where the destination device is located. This helps to reduce unnecessary network traffic and optimize data transmission within the network.
The function of a bridge is to segment and manage network traffic by creating separate collision domains. By examining the MAC addresses of incoming packets, a bridge can determine whether to forward the packet to another segment or discard it if it is intended for a device within the same segment. This segmentation helps to improve overall network performance and reduce congestion by limiting the scope of broadcast traffic.
A WiFi bridge works by wirelessly connecting two or more separate networks or segments. It acts as a wireless access point that receives data packets from one network segment, typically via WiFi, and forwards them to another network segment connected through a wired or wireless connection. WiFi bridges are commonly used to extend the coverage of wireless networks, bridge wireless and wired LANs, or connect remote devices wirelessly to a central network.
An example of a network bridge is a wireless bridge that connects two separate WiFi networks to create a single extended network. Another example is an Ethernet bridge, which connects two Ethernet networks or segments using Ethernet cables, effectively extending the reach of the network and facilitating seamless communication between devices in different physical locations.
Ethernet bridges, also known as switch bridges, operate by examining the MAC addresses of incoming Ethernet frames. They maintain a table (MAC address table) that maps MAC addresses to the physical ports of the bridge. When a frame arrives at the bridge, it checks the destination MAC address against its table and forwards the frame only to the appropriate port where the destination device is located. This process helps to reduce unnecessary traffic and improve network efficiency by allowing devices within the same network segment to communicate directly without affecting other segments.
