Why open x11 ports?

Question

linux

I'm trying to set up a vnc connection on opensuse 42.1, in order to understand on which port it works, I launched nmap and drove in the address, displayed open ports, + port 6001 of the X11: 1 service, and within 5 minutes it reached 7 open ports from 6001-6007 ,and everything from an X11 service... what is this service? Is it related to vnc?

Answer 1

everything from X11 service...what kind of service is this

https://en.wikipedia.org/wiki/X_Window_System
It displays the VNC window just like all other windows.
To display application windows running on other machines.
But in general it is some kind of atavism. On modern distributions, x11 usually only listens on the unix domain socket.