Is it possible to determine all network interfaces on a machine using WebRTC?

Question

Anonymity

Hello.
Does anyone have a machine at hand with two network interfaces or with a virtual machine installed?
I want to check how WebRTC works if there are 2 interfaces on the machine, physical or virtual, it doesn’t matter. Who is not difficult and who has it, look here https://diafygi.github.io/webrtc-ips/ Does the service define only one interface or both?
I will be grateful for the answer.

Answer 1

On a physical machine, I saw 2 interfaces (and there are two of them).
On a virtualka lifted 3 interfaces - saw three.