Network bridge facts for kids
A network bridge is a special device that helps connect two separate parts of a computer network. Think of it like a bridge over a river, connecting two pieces of land. It works at a specific level of the network, called the data link layer (also known as Layer 2 of the OSI model). This layer is where devices communicate directly with each other using their unique hardware addresses.
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What is a Network Bridge?
A network bridge is a piece of hardware that links two different network segments. It acts as a filter, deciding which data should pass from one side to the other. This helps keep network traffic organized and efficient. Bridges are smarter than some older network devices because they can understand where data needs to go.
How Does a Network Bridge Work?
Network bridges learn the addresses of all the devices connected to each part of the network. When data arrives at the bridge, it looks at the destination address. If the data is meant for a device on the same side of the bridge, it won't send it across. If the data is for a device on the other side, then the bridge sends it through. This smart filtering helps reduce unnecessary traffic on each network segment.
Bridge vs. Switch vs. Hub
It's helpful to understand how a bridge is different from other network devices:
- A network hub is the simplest device. It sends all incoming data to every device connected to it. This can create a lot of unnecessary traffic.
- A network switch is like a very advanced bridge. It also learns device addresses and sends data only to the correct destination. Modern switches are often called "multi-port bridges" because they do the same job but with many more connections.
- A network bridge connects just two network segments. It's smarter than a hub but simpler than a full switch. Sometimes, bridges are even called "Layer 2 switches" because they work at the same network layer.
Why Do We Use Network Bridges?
Network bridges are useful for several reasons:
- Reducing Traffic: By only sending data to where it needs to go, bridges help reduce the amount of data flowing through each part of the network. This makes the network faster and more efficient.
- Connecting Different Networks: They can connect two networks that use the same type of technology, like two Ethernet networks.
- Improving Performance: By dividing a large network into smaller parts, bridges can improve the overall speed and performance for users.
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In Spanish: Puente de red para niños
