How are VPS connected directly to WAN? [closed]

How is it that a VPS can be connected to WAN (Wide area network) without port forwarding?

Answer

The physical interface of the host machine acts as a virtual switch (a bridge, really) where the virtual interfaces of the VPS are connected to. This way, you can connect multiple virtual interfaces with just one physical one.

Attribution
Source : Link , Question Author : LifeInKernelSpace , Answer Author : Sven

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