no, it depends which language you use, but each allows you to 'listen' on an ip address and a port.

The point is that the most commonly used IP is 127.0.0.1 but we can as well use 127.120.99.12 because the entire subnet is the loopback address.

https://github.com/thewhitetulip/web-dev-golang-anti-textboo... For an example in Go.