An example of a network bridge is a wired Ethernet bridge. A network bridge is a networking device that connects two separate networks and allows them to communicate with each other. It operates at the data link layer (Layer 2) of the OSI model and is typically used to extend a local area network (LAN) or connect LANs in separate physical locations.
Here's a step-by-step explanation of how a wired Ethernet bridge works:
1. Identify the two networks you want to connect. These networks can be in different physical locations or segments, such as two separate buildings within a campus or two different floors in the same building.
2. Obtain a network bridge device, commonly known as a bridge or a bridge router. This device should have at least two Ethernet ports to connect the networks.
3. Connect one Ethernet port of the bridge device to the first network. This can be done by plugging an Ethernet cable from the bridge to a switch or a router on that network.
4. Connect the other Ethernet port of the bridge device to the second network in the same manner.
5. Configure the bridge device with appropriate settings. This may involve assigning IP addresses, subnet masks, and gateway information to the ports connected to each network.
6. Ensure that both networks have unique IP address ranges and don't overlap. For example, if the first network uses the IP range 192.168.1.0/24, ensure that the second network uses a different range like 192.168.2.0/24.
7. Test the connectivity by connecting devices from each network to the bridge device. Verify that devices on one network can communicate with devices on the other network seamlessly.
By using a network bridge, you can effectively extend your LAN or connect separate LANs without the need for complex routing or additional equipment. This can be particularly useful in scenarios where running new network cabling is not feasible, but wired connectivity is required for reliable and high-speed network communication.