A couple of questions about Apache.... Not listening on a port?

Question

Apache HTTP Server

Linux Ubuntu Server
1) There was a site on Apache. Have worked.
After changing the IP (192.168.1.106 to 192.168.1.109 ) the pages do not open in the browser...
But if you return the old IP, it works...
I don't understand what is the connection between IP and Apache?
What should I do so that Apache gives out pages, even if I change the IP?
2) Port 80 tcp in netstat, why is it not there

why is there only tcp6 ::: 80? and ipv4 80 port LISTEN is not present? even if without grep LISTEN.
Is that how it should be?
UPD
Found.
The documentation says that you need to change Listen 80 to Listen 0.0.0.0:80 in the config port . Toda and in netstat there will be a line for ipv4

Answer 1

1. most likely in virtual hosts it is explicitly written on which interface it listens to the port (directly ip like xxx.xxx.xxx.xxx:80 instead of *:80)
2. yes, this is normal (c)