What are the differences between the two Nginx configurations?

Question

Nginx

Hello. What's the Difference?

server {
          listen 80 default_server;
        listen [::]:80 default_server;

and

server {
listen 80;

Answer 1

Support for IPv6 and the fact that the server will be default, i.e. if nginx does not find a suitable host (server_name), then it will start with default_server