A bridge connection lets two separate networks talk to each other as if they were one

A bridge connection is a way to connect two networks so devices on one side can communicate with devices on the other side. Think of it like a physical bridge between two islands — traffic can cross from one island to the other without the islands becoming one. On your computer or phone, a bridge connection most often appears when you connect a wired network and a wireless network together, or when you want to share an internet connection from one device to another.

The most common reason you'll encounter a bridge is when you're trying to get internet to a device that doesn't have its own connection. For example, if you have a laptop connected to WiFi and a desktop computer with only an ethernet port, you can bridge the WiFi connection to the ethernet port. The desktop then uses the laptop's internet without the two networks actually merging into one.

Bridges are different from routers. A router creates a new network and controls traffic between that network and the internet. A bridge straightforward passes traffic through — it doesn't manage or filter anything, it just opens a path.

Key Takeaways

  • A bridge connection connects two separate networks so they can communicate, without turning them into a single network.
  • The most practical use is sharing an internet connection from one device to another when the second device has no direct access.
  • On Windows, you create a bridge by selecting two network connections and choosing "Bridge Connections" from the right-click menu.
  • On Mac, you use System Preferences to add a bridge interface and assign your network connections to it.
  • Bridge connections work best for straightforward setups with two networks; more complex networks usually need a router instead.

When you actually need a bridge connection

Most people never need to create a bridge connection because their router already does the job. But there are real situations where a bridge solves a problem. If you have a desktop computer in a room where running an ethernet cable is difficult, and you have a laptop with WiFi in the same room, you can bridge the laptop's WiFi to the desktop's ethernet port. The desktop gets internet through the laptop.

Another scenario: you're traveling with a laptop and a tablet, and the hotel WiFi only lets you connect one device at a time. If your laptop is connected, you can bridge that connection to your tablet through USB or Bluetooth, and both devices work. This is sometimes called tethering, though tethering usually refers to sharing a phone's cellular connection.

Bridge connections also appear in network testing and troubleshooting. If you're trying to diagnose whether a network problem is on one side of a connection or the other, a bridge lets you pass traffic through without a router's filtering getting in the way.

How to create a bridge connection on Windows

On Windows 10 and 11, you create a bridge by connecting two network adapters together. First, make sure both connections are active — for example, one ethernet cable plugged in and one WiFi network connected. Then open Settings and go to Network & Internet. You'll see a list of your network connections.

Right-click on one of the connections and look for "Bridge Connections" in the menu. If you don't see it, you may need to open Control Panel instead and go to Network and Sharing Center. Select both connections you want to bridge (hold Ctrl and click the second one), then right-click and choose "Bridge Connections." Windows will create a new bridged connection that carries traffic between them.

Once the bridge is active, any device connected to one network can reach devices on the other. The bridge itself doesn't have an IP address — it's invisible to the networks it connects. If something goes wrong, you can remove the bridge by right-clicking it and choosing "Remove Bridge."

How to create a bridge connection on Mac

On Mac, the process is different because you use System Preferences rather than a right-click menu. Open System Preferences and go to Network. Click the plus sign at the bottom left to create a new interface. From the dropdown menu, select "Bridge" as the interface type.

Once you've created the bridge interface, you'll see a second dropdown that says "Bridge Built-in Ethernet to." This is where you choose which two connections to bridge together. Select the connections you want to connect, then click Create. The bridge will set up when ready.

On newer Macs running macOS Monterey or later, the process has moved to System Settings instead of System Preferences, but the steps are the same. If you need to remove the bridge, go back to Network settings, select the bridge, and click the minus sign.

Why bridge connections have limits

A bridge connection works well for straightforward setups, but it has real constraints. It doesn't manage traffic the way a router does, so it can't prioritize which data goes first or block unwanted connections. If you're sharing internet between many devices, a bridge will slow down because it has no way to organize the flow.

Bridges also don't work across the internet — both networks have to be physically connected to the same computer or device. You can't bridge a home network to an office network through the cloud. For that, you'd need a VPN or a more complex networking setup.

Another limitation: some devices and programs don't work well when bridged. Certain security software, printers, and smart home devices expect to be on a single unified network, not two networks connected by a bridge. If you're having trouble after creating a bridge, removing it is usually the first troubleshooting step.

Bridge connections versus other networking methods

A bridge is one of several ways to connect networks, and it's important to know which tool fits your situation. A router is the most common choice — it creates a new network and controls all traffic. A switch is simpler than a bridge and just passes all data through without any intelligence. A repeater extends a wireless signal but doesn't create a new network. A gateway connects networks that use different protocols, like connecting an old network to a new one.

For most home and office setups, a router is what you actually want. Bridges are useful when you already have two networks and just need them to talk to each other temporarily. If you're setting up a new network from scratch, buy a router instead of trying to bridge connections.

Troubleshooting a bridge connection that isn't working

If you've created a bridge but devices on one network can't reach devices on the other, start by checking that both connections are actually active. On Windows, open Command Prompt and type ipconfig to see all your network adapters. On Mac, open Terminal and type ifconfig. Both connections should show an IP address.

Next, check that the bridge itself is active. On Windows, go back to Network settings and confirm the bridge shows a status of "Connected." On Mac, go to Network settings and make sure the bridge interface is selected and shows "Connected." If the bridge shows as disconnected, try removing it and creating it again.

If both connections are active and the bridge is connected but devices still can't communicate, the problem may be a firewall. Windows Defender Firewall or third-party security software might be blocking traffic across the bridge. Try temporarily disabling the firewall to test, then add an exception for the bridge if that fixes it.

Frequently Asked Questions

Can I bridge a WiFi connection to another WiFi connection?

Technically yes, but it rarely works well in practice. Most WiFi adapters can't transmit and receive on the same frequency at the same time, so the bridge becomes very slow. If you need to extend WiFi coverage, a WiFi repeater or mesh network is a better choice.

Will a bridge connection slow down my internet?

A bridge itself doesn't add much slowdown, but sharing one internet connection between multiple devices will reduce the speed each device gets. If your laptop is connected to WiFi at 50 Mbps and you bridge that to a desktop, both devices will share that 50 Mbps. A router with multiple connections would be faster.

Can I bridge connections on my phone or tablet?

Most phones and tablets don't let you create a bridge connection in the traditional sense. However, they do let you share their internet connection through tethering, which is similar in purpose — it lets other devices use the phone's connection. Look for "Personal Hotspot" on iPhone or "Mobile Hotspot" on Android.

What's the difference between a bridge and a VPN?

A bridge connects two local networks that are physically near each other. A VPN connects networks across the internet and encrypts the traffic between them. If you're trying to connect two offices in different cities, a VPN is what you need, not a bridge.

Do I need a bridge connection for gaming or streaming?

No. For gaming and streaming, you just need a stable internet connection. A bridge connection is only useful if you're trying to share one device's internet with another device. If both devices can connect to your WiFi router directly, that's faster and simpler.