2

I know MAC is a layer 2 address, so it's only sent to the next router in the chain.

Does a VPN provider get that information when I'm connected to their service? Is their router considered the next router or is my actual physical router next in chain?

5

No, they do not. Tunnel interfaces don't have media addresses assigned to them. In any case the address assigned to another interface, such as a virtual bridge for virtual machines, would different from your network card.

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