A network bridge is software or hardware that connects two or more networks so that they can communicate. You can create only one network bridge on a computer, but one bridge can handle any number of network connections.
Open Network Connections by clicking the Start button , clicking Control Panel, clicking Network and Internet, clicking Network and Sharing Center, and then clicking Manage network connections.
Hold down CTRL and select each network connection that you want to add to the bridge.
Right-click one of the selected network connections, and then click Bridge Connections.
If you are prompted for an administrator password or confirmation, type the password or provide confirmation.
You shouldn't create a bridge between an Internet connection and a network connection because it creates an unprotected link between your network and the Internet, which makes your network accessible to anyone on the Internet.