Tailscaled opens multiple ports?

hello and thanks,

ubuntu 21.04 + windows 10.21h1 - ts 1.14.0

trying to understand what tailscaled is using port 37856 for?

ubuntu@ubuntu:~$ sudo netstat -tulpn | grep tailscaled
tcp 0 0* LISTEN 9614/tailscaled
tcp6 0 0 fd7a:115c:a1e0:ab:37856 :::* LISTEN 9614/tailscaled
udp 0 0* 9614/tailscaled
udp6 0 0 :::41641 :::* 9614/tailscaled

That is most likely the peerapi port, only reachable over the Tailscale network. It is used to implement taildrop Taildrop (alpha) ยท Tailscale and other functions between nodes in the Tailnet.