Which is the function of "tap107i0" network device?

[gianry]

I've found in my proxmox installation the tap107i0 device with networkctl command.

which is the function of that device ?

 

[shanreich]

It's the virtual network device that is passed to the virtual machine, you can read more about tap devices here [1].

[1] https://en.wikipedia.org/wiki/TUN/TAP