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    answered Nov 26, 2019 at 15:42

    I think this can help you. A resume of that:

    If you use 127.0.0.1, then (intelligent) software will just turn that directly into an IP address and use it. Some implementations of gethostbyname will detect the dotted format (and presumably the equivalent IPv6 format) and not do a lookup at all.

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      localhost is generally the address 127.0.0.1 but the :8080 part means to connect to port 8080 instead of the default port 80. 127.0.0.1:8080 will be the same as localhost:8080, not plain 127.0.0.1. Port 8080 is a popular port to host things like angular apps, nodeJS scripts, et cetera. @Pointy @Shilly Ok, that makes sense.
      There is no real difference between 127.0.0.1 and localhost. Some programs may like one over the other, but they both point to the same location: your computer. You can imagine localhost as the "name" for the 127.0.0.1 address, much like how "www.google.com" is the "name" for Google's IP address.
      127.0.0.1 is special among IP addresses. Typically, an IP address is unique to every computer on both your local network and the internet. 127.0.0.1, however, always points to the computer you're currently using no matter what. For example, if you set up a server on Computer A, you can connect to it by visiting 127.0.0.1 on Computer A.
      Localhost is not an exception to this. So, if you type localhost to your browser’s address bar, it transforms to the IP address 127.0.0.1. This 127.0.0.1 IP address is reserved for local servers on computers, so you will never find another IP address that starts with 127.
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