Loopback address

alt-name Local Host This is a special software address that connects

you to your own system. Software and services not running on your system can’t use it. You would use lo to test something on your system, such as your own web server.

The localhost is generally represented with the IP address 127.0.0.1 - An easy way to self refence is to ping 127.0.0.1

[!quote] defult gateway ; subnet mask ; DNS