Is the physical address of the device displayed when accessing the network through a proxy?

Question

proxy

How is my presence on the network seen if I go through a proxy server? What does a site or remote server administrator see? Is the physical address of the device visible? I understand, of course, that a lot depends on where and how the proxy server is located.

Answer 1

The MAC address is visible only within one Ethernet segment. Remote server shared internet with you can't see your mac

Answer 2

If the site uses JS, a lot of data is visible.

Answer 3

Do I understand correctly - we are talking about using VPS?