Open ports while using Local

What are the normal ports that are supposed to be opened by LOCAL (or when running a site using Local).

running netstat in my Windows PC give me a bunch of processes that keep opened ports which remote host name is mysitename.local (the first site I have in LOCAL)

(40 open ports in total, all going local address to, none of them referring to Local.exe or something equivalent. For example, two of these processes are two instances of mDNSResponder.exe going from Local Port 5354 (both) to Remote Port 51332 and 51333.

Any help in understanding the port handling by LOCAL or pointing to technical info lo learn about it would be highly appreciated.