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The bridge lets you connect your virtual machine to the LAN used by your host computer. It connects the virtual network adapter in your virtual machine to the physical Ethernet adapter in your host computer.
The bridge is installed during VMware Workstation installation (on a Linux host, you must choose to make bridged networking available to your virtual machines). When you create a new virtual machine using bridged networking, the bridge is set up automatically.
You can set up additional virtual bridges for custom configurations that require connections to more than one physical Ethernet adapter on the host computer.